JPH07244044A - Wood pillar rotted degree measuring device - Google Patents
Wood pillar rotted degree measuring deviceInfo
- Publication number
- JPH07244044A JPH07244044A JP6033511A JP3351194A JPH07244044A JP H07244044 A JPH07244044 A JP H07244044A JP 6033511 A JP6033511 A JP 6033511A JP 3351194 A JP3351194 A JP 3351194A JP H07244044 A JPH07244044 A JP H07244044A
- Authority
- JP
- Japan
- Prior art keywords
- measuring rod
- decay
- measuring
- rod
- guide
- 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.)
- Granted
Links
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、矩形木柱の根腐れを検
出し、木柱の強度測定を行うための木柱腐朽度測定器に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wooden pole decay degree measuring instrument for detecting root rot of a rectangular wooden pole and measuring the strength of the wooden pole.
【０００２】[0002]
【従来の技術】通信線や電力線を支持する柱として木製
の電信柱（以下木柱と称す）が使用されている。ところ
が、木柱においては、地中おいて腐朽する「根腐れ」現
象によって倒壊する重大な問題がある。このため、設備
の維持や安全性確保のため木柱腐朽点検が行われてき
た。従来の点検方法として、次の３方法を紹介する。す
なわち、（１） ハンマーで木柱を叩き腐朽による異音
を聞き分けるもの、（２）錐を地中の木柱にむかって刺
し込み、腐朽部が健全部に較べて容易に刺し込むことが
できることから腐朽を検知するもの、（３） 根腐れし
た木柱は健全木柱に較べて揺れやすいことから検知する
ものなどがある。これらの方法においては、点検者の勘
に頼るところ大であり腐朽検出の確度が劣るばかりでな
く、その腐朽程度を定量化することができなかった。2. Description of the Related Art Wooden poles (hereinafter referred to as wooden poles) are used as pillars for supporting communication lines and power lines. However, the wooden pillar has a serious problem that it collapses due to the phenomenon of "root rot" that decays in the ground. For this reason, wooden pillar decay inspections have been conducted to maintain equipment and ensure safety. The following three methods are introduced as conventional inspection methods. That is, (1) a hammer hits a wooden pole to detect abnormal noise due to decay, and (2) a cone is pierced toward a wooden pole in the ground so that the decayed portion can be easily inserted compared to a healthy portion. (3) Root-rotted wooden pillars are more susceptible to shaking than healthy wooden pillars. In these methods, it depends largely on the intuition of the inspector, and not only the accuracy of detecting decay is poor, but also the degree of decay cannot be quantified.
【０００３】一方、客観的な測定で腐朽を定量化できる
木柱腐朽診断方法としては、超音波を用いたものがある
（特開昭５９−５９５０号）。この方法の概要は以下の
通りである。即ち、図７に示すように、外皮をはぎ防腐
処理した丸木柱１においては、腐朽部２は地中部で根腐
れ、地面３の直上で内部腐朽の形態をとる。本来根腐れ
の検知をしたいところであるが、このためには地面を掘
るなどの作業が必要となる。そこで根腐れがあると地面
直上で内部腐朽がある特性に着目し、内部腐朽を検知す
ることにより間接的に根腐れを検知している。内部腐朽
の検知には超音波を利用している。この方法を図８
（ａ），（ｂ）を用いて説明する。図８（ａ），（ｂ）
は超音波の伝播径路についての健全部と内部腐朽を有す
る部分の比較である。即ち、図８（ａ）に示すような健
全な木柱においては、年輪中心が幾何学的な中心になく
ても、超音波発信子４から超音波受信子５への超音波伝
播径路６はほぼ最短距離をとり、直径間の超音波伝播時
間はほぼ等しい。ところが、図８（ｂ）に示すように、
内部腐朽部７があると、腐朽部７は超音波が伝播でき
ず、超音波発信子４から超音波受信子５への超音波伝播
径路６′は遠回りする。このため、腐朽部７があると超
音波伝播時間が長くなり、この時間遅れによって腐朽検
知ができることになる。大きな時間遅れは大きな内部腐
朽の存在を示しており、すなわち著しい根腐れを示唆す
ることになる。この方法には２つの欠点がある。On the other hand, as a method of diagnosing decay of wooden poles which can quantify decay by objective measurement, there is a method using ultrasonic waves (Japanese Patent Laid-Open No. 59-5950). The outline of this method is as follows. That is, as shown in FIG. 7, in a log post 1 whose outer skin is peeled off and preserved, the decay portion 2 is root-rotated in the underground portion and is in the form of internal decay immediately above the ground 3. Originally, we would like to detect root rot, but this requires work such as digging the ground. Therefore, the root rot is indirectly detected by detecting the internal rot by focusing on the characteristic that the root rot has internal rot directly above the ground. Ultrasonic waves are used to detect internal decay. This method is shown in FIG.
A description will be given using (a) and (b). 8 (a), (b)
Is a comparison of the sound propagation path of ultrasonic waves and the part with internal decay. That is, in a sound wooden pole as shown in FIG. 8A, the ultrasonic wave propagation path 6 from the ultrasonic wave transmitter 4 to the ultrasonic wave receiver 5 is provided even if the center of the annual ring is not located at the geometric center. At the shortest distance, the ultrasonic propagation times between the diameters are almost equal. However, as shown in FIG.
If the internal decay portion 7 is present, ultrasonic waves cannot propagate through the decay portion 7, and the ultrasonic wave propagation path 6 ′ from the ultrasonic wave transmitter 4 to the ultrasonic wave receiver 5 goes around. Therefore, if there is the decay portion 7, the ultrasonic wave propagation time becomes long, and decay can be detected by this time delay. A large time lag indicates the presence of large internal decay, i.e. suggesting significant root rot. This method has two drawbacks.
【０００４】（１） 腐朽は図７に示す形態を前提とし
ているのでこの形態以外の腐朽には腐朽診断ができな
い。例えば、地面直上で内部腐朽を示さない場合は、根
腐れがあっても健全と判断してしまう。(1) Since decay is based on the form shown in FIG. 7, decay cannot be diagnosed for decays other than this form. For example, if there is no internal decay directly above the ground, it is considered healthy even if there is root rot.
【０００５】（２） 図８（ａ）に示すように外皮を剥
いだだけの健全な丸木柱では直径間の超音波伝播時間は
ほぼ等しい。ところが、図９（ａ）に示すように健全な
矩形木柱（１５ｃｍ×１５ｃｍ）では、図９（ｂ）に示
すように測定する位置イ、ロ、ハ、ニによって距離が同
じでも超音波伝播時間が等しくならない。したがって、
腐朽の有無を超音波伝播時間の差異によって検知するこ
とがむずかしい。(2) As shown in FIG. 8 (a), the sound wave propagation time between the diameters is almost the same in a sound log column with the outer skin just peeled off. However, as shown in FIG. 9A, in a sound rectangular wooden pole (15 cm × 15 cm), ultrasonic waves propagate at the same distance depending on the measurement positions A, B, C, and D as shown in FIG. 9B. The times are not equal. Therefore,
It is difficult to detect the presence or absence of decay based on the difference in ultrasonic propagation time.
【０００６】[0006]
【発明が解決しようとする課題】本発明は上記の事情に
鑑みてなされたもので、地面直上に内部腐朽を生じない
腐朽形態の矩形木柱の根腐れによる腐朽度をもとめる木
柱腐朽度測定器を提供することを目的とする。DISCLOSURE OF THE INVENTION The present invention has been made in view of the above circumstances, and measures the degree of decay of wooden poles by determining the degree of decay due to root rot of a rectangular wooden pole in a decay form that does not cause internal decay directly above the ground. The purpose is to provide a container.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に本発明は、少なくとも一部が地中に位置する、断面が
矩形の木柱の、地中に位置する部分の腐朽の程度を検出
する木柱腐朽度測定器において、前記測定器が、円柱棒
の先端が折り曲げられた測定棒と、該測定棒の回動を保
持した状態で該測定棒の一部を収納する溝を有してなる
ガイドと、該測定棒を収納した該ガイドを前記木柱の表
面に固定するクランプからなり、かつ該測定棒には棒の
回転の角度指示針を有し、該ガイドには角度表示板を有
してなることを特徴とするものである。In order to achieve the above object, the present invention detects the degree of decay of a portion of a wooden pole having a rectangular cross section, which is at least partially located in the ground, located in the ground. In the wooden pole decay degree measuring instrument, the measuring instrument has a measuring rod in which a tip of a cylindrical rod is bent, and a groove for accommodating a part of the measuring rod in a state where the rotation of the measuring rod is held. And a clamp for fixing the guide accommodating the measuring rod to the surface of the wooden pole, the measuring rod having an angle indicating needle for rotating the rod, and the guide having an angle display plate. It is characterized by having.
【０００８】[0008]
【作用】上記手段により本発明による測定器は、測定棒
を根腐れの著しい深さまで打ち込み、測定棒先端の折り
曲げ部の回転角によって根腐れによる断面減少を求める
ことを特徴とする。従来の技術とは、根腐れによる断面
減少を定量的に直接求める点が異なっている。With the above-mentioned means, the measuring instrument according to the present invention is characterized in that the measuring rod is driven to a depth at which the root rot is remarkable and the cross-section reduction due to the root rot is obtained by the rotation angle of the bent portion at the tip of the measuring rod. It differs from the conventional technique in that the cross-sectional reduction due to root rot is directly obtained quantitatively.
【０００９】[0009]
【実施例】以下図面を参照して本発明の実施例を詳細に
説明する。本発明の実施例の１つを以下に説明する。図
１（ａ），（ｂ），（ｃ）は、本発明測定器の構成部品
を示す。図１（ａ）は円柱棒よりなる測定棒１１であ
り、先端には折り曲げ部１２があり、上部には測定棒１
１を回転させる把手１３があり、またこの把手１３には
測定棒１１の回転角を指示する角度指示針１４が固定さ
れている。図１（ｂ）は測定棒１１の回動を保持した状
態で、測定棒１１が軸方向のみに移動しぶれないための
例えばアルミよりなるガイド１５である。ガイド１５に
は測定棒１１の一部を収納する測定棒拘束溝１６があ
り、測定棒１１はこの溝１６に収まる。またガイド１５
の上部には角度表示板１７があり、前記角度指示針１４
はこの角度表示板１７上を動く。前記ガイド１５の両側
にはそれぞれ押え板２２が設けられる。図１（ｃ）は、
測定棒１１を収納したガイド１５を矩形木柱の表面に固
定するためのクランプ１８である。クランプ１８は固定
当接部１９と可動当接部２０との間に木柱とガイド１５
を挟み、把手２１により可動当接部２０を回転しながら
固定当接部１９の方向へ移動することにより挟持固定す
る。これにより測定棒１１は、測定棒拘束溝１６と矩形
木柱表面とで挾まれた通路のみを動くことになりぶれを
生じない。Embodiments of the present invention will now be described in detail with reference to the drawings. One of the embodiments of the present invention will be described below. 1 (a), (b), and (c) show components of the measuring instrument of the present invention. FIG. 1A shows a measuring rod 11 made of a cylindrical rod, which has a bent portion 12 at its tip and an upper portion of the measuring rod 1.
There is a handle 13 that rotates 1, and an angle indicating needle 14 that indicates the rotation angle of the measuring rod 11 is fixed to the handle 13. FIG. 1B shows a guide 15 made of, for example, aluminum for preventing the measurement rod 11 from moving only in the axial direction while keeping the rotation of the measurement rod 11. The guide 15 has a measuring rod restraining groove 16 for accommodating a part of the measuring rod 11, and the measuring rod 11 fits in this groove 16. Also guide 15
An angle display plate 17 is provided on the upper part of the
Moves on this angle display plate 17. Pressing plates 22 are provided on both sides of the guide 15, respectively. Figure 1 (c)
It is a clamp 18 for fixing the guide 15 accommodating the measuring rod 11 to the surface of a rectangular wooden pole. The clamp 18 includes a wooden pole and a guide 15 between the fixed contact portion 19 and the movable contact portion 20.
And the movable contact portion 20 is rotated by the handle 21 and moved in the direction of the fixed contact portion 19 so as to be clamped and fixed. As a result, the measuring rod 11 moves only in the path sandwiched between the measuring rod restraining groove 16 and the surface of the rectangular wooden pole, and no blur occurs.
【００１０】図２（ａ），（ｂ），（ｃ）はガイド１５
の構造を三面図で示す。クランプ１８によってガイド１
５が測定棒１１を木柱に押えつけても、ガイド１５に溝
１６があるために、測定棒１１は自由に回転できる。押
え板２２の大きさは、木柱の大きさによって適宜設定す
るが、通常は縦、横、幅ともにＫ＝１０ｃｍ程度の大き
さである。2 (a), 2 (b) and 2 (c) show a guide 15
The structure of is shown in three views. Guide 1 by clamp 18
Even if 5 presses the measuring rod 11 against the wooden pole, the measuring rod 11 can freely rotate because of the groove 16 in the guide 15. Although the size of the holding plate 22 is appropriately set according to the size of the wooden pole, the length, width, and width are usually about K = 10 cm.
【００１１】次に本発明の測定器の使用方法を図３及び
図４を用いて説明する。図３（ａ）に示すように先ず、
測定棒１１をガイド１５の溝１６に入れ、矩形木柱２３
に押しつける。次にクランプ１８によってガイド１５を
矩形木柱２３に強く固定する。こうすることによって、
先端を折り曲げた真っ直ぐな測定棒１１は、ガイド溝１
６と木柱２３の面で囲まれた通路によって軸方向上下に
ぶれ無く移動させることができる。次に図３（ｂ）に示
すように測定棒１１は人間の手２４に持たれたハンマー
２５によってその頭部が打撃され地中に打ち込まれる
が、矩形木柱２３の表面とガイド１５によって測定棒１
１は矩形木柱２３の表面と同一平面内に拘束される。測
定棒１１の打ち込み深さは、根腐れによる腐朽が最も著
しい位置までとする。次に図４（ａ）に示すように地中
部が腐朽した矩形木柱２３は、減肉している。このた
め、把手２１により測定棒１１を回すと、その先端の折
り曲げ部１２が矩形木柱２３の表面からさらに内部に回
転できる。次に図４（ｂ）に示すように測定棒１１は矩
形木柱２３の腐朽による減肉が著しいほど回転角度は大
きくなることから、角度指示針１４により角度表示板１
７の目盛を読み取れば腐朽層の厚さを求めることができ
る。Next, a method of using the measuring instrument of the present invention will be described with reference to FIGS. 3 and 4. First, as shown in FIG.
The measuring rod 11 is put in the groove 16 of the guide 15, and the rectangular wooden pole 23
Press on. Next, the guide 15 is firmly fixed to the rectangular wooden pole 23 by the clamp 18. By doing this,
The straight measuring rod 11 with the tip bent is the guide groove 1
By the passage surrounded by 6 and the surface of the wooden pole 23, it is possible to move vertically without shaking. Next, as shown in FIG. 3B, the head of the measuring rod 11 is struck by the hammer 25 held by the human hand 24 and is driven into the ground, but the measurement rod 11 is measured by the surface of the rectangular wooden pole 23 and the guide 15. Stick 1
1 is constrained within the same plane as the surface of the rectangular wooden pole 23. The driving depth of the measuring rod 11 is set to a position where the decay due to root rot is most remarkable. Next, as shown in FIG. 4 (a), the rectangular wooden pillar 23 whose underground portion has decayed has a reduced thickness. Therefore, when the measuring rod 11 is rotated by the handle 21, the bent portion 12 at the tip thereof can be further rotated inward from the surface of the rectangular wooden pole 23. Next, as shown in FIG. 4 (b), the rotation angle of the measuring rod 11 increases as the thickness of the rectangular wooden post 23 is significantly reduced due to decay.
The thickness of the decay layer can be calculated by reading the scale of 7.
【００１２】図５（ａ），（ｂ）は本発明に係る測定
器、木柱、地面の位置関係を示す説明図で、本発明測定
器が実際に、地面２７に建てられた木柱２３に使用され
ている状況を示す。このように測定棒１１の先端部分を
地中に打ち込んで、その測定棒１１をどの角度までねじ
って、回転できるかによって、腐った部分厚さを測定す
る。測定棒１１を打ち込む深さはだいたい地下１０ｃｍ
〜４０ｃｍ程度のところである。測定棒１１は長さが約
５０ｃｍ程度、太さが直径１ｃｍ〜２ｃｍ程度で、地中
に打ち込まれても先端の折り曲げ部１２がそれ以上曲が
らないほどの、鉄等の頑強な材質でできている。ガイド
１５の溝１６の長さは約１０ｃｍ程度である。角度指示
針１４のついている腕木把手１３の長さは１０ｃｍ〜２
０ｃｍ程度で、この腕木把手１３の端を持ってねじる
が、ねじる力は、だいたい成人男性が片手で力いっぱい
まわす程度である。屋外で間便に利用するためにあえて
トルクレンチ等は用いない。この程度でだいたいの腐朽
度を測定できる。FIGS. 5 (a) and 5 (b) are explanatory views showing the positional relationship between the measuring instrument according to the present invention, the wooden pole, and the ground. The wooden measuring instrument 23 of the present invention is actually built on the ground 27. Indicates the situation used in. In this way, the tip portion of the measuring rod 11 is driven into the ground, and the rotten partial thickness is measured depending on the angle at which the measuring rod 11 can be twisted and rotated. The depth of driving the measuring rod 11 is about 10 cm underground
It is about 40 cm. The measuring rod 11 has a length of about 50 cm, a diameter of about 1 cm to 2 cm, and is made of a sturdy material such as iron so that the bent portion 12 at the tip does not bend even if it is driven into the ground. There is. The groove 16 of the guide 15 has a length of about 10 cm. The arm handle 13 with the angle indicating needle 14 has a length of 10 cm to 2
At about 0 cm, the arm grip 13 is twisted while holding it by the end, but the twisting force is about the same as an adult male turning with one hand. Do not use a torque wrench or the like to use it outdoors for convenience. Roughness can be measured at this level.
【００１３】測定棒１１の先端の回転から腐朽層厚さを
求める原理を図６を用いてさらに詳細に説明する。図６
（ａ）に示すように測定棒１１の上部を把手を以て回す
とその先端部の折り曲げ部１２も同じ角度だけ回る。図
６（ｂ）に示すように地中部が腐朽していない健全木柱
２３０１であれば矩形木柱２３０１の表面によって折り
曲げ部１２は内部に回転できない。一方、図６（ｃ）に
示すように腐朽部２６を有する腐朽木柱２３０２では、
矩形木柱２３０２の表面が脱落し後退しているため健全
木柱２３０１よりもさらに内部に折り曲げ部１２が回転
する。図６（ｄ）に示すように健全木柱２３０１の場合
の回転角を０度とし腐朽木柱２３０２での回転角をθ度
とする。また、折り曲げ部１２の回転中心から先端まで
の長さをＬとすると、腐朽層厚さＴは、Ｔ＝Ｌ×sin θ
で与えられる。The principle of determining the decay layer thickness from the rotation of the tip of the measuring rod 11 will be described in more detail with reference to FIG. Figure 6
As shown in (a), when the upper portion of the measuring rod 11 is turned with a handle, the bent portion 12 at the tip also turns by the same angle. As shown in FIG. 6 (b), if the underground part is a sound wooden pole 2301 that has not decayed, the bent portion 12 cannot rotate inward due to the surface of the rectangular wooden pole 2301. On the other hand, as shown in FIG. 6C, in the decaying wooden pole 2302 having the decaying portion 26,
Since the surface of the rectangular wooden pole 2302 has fallen off and has receded, the bent portion 12 rotates further inside than the healthy wooden pole 2301. As shown in FIG. 6D, the rotation angle in the case of the healthy wooden pole 2301 is 0 degree, and the rotation angle in the decayed wooden pole 2302 is θ degree. Further, when the length from the center of rotation of the bent portion 12 to the tip is L, the decay layer thickness T is T = L × sin θ
Given in.
【００１４】以上により根腐れによる断面減少の測定方
法を説明したが、次に強度推定方法を説明する。一般に
柱の曲げ強度は、材料力学からその断面係数に比例す
る。例えば、一辺がａcmの正方形の柱の断面係数Ｚは、
Ｚ＝ａ3 ／６で与えられる。例えば、一辺が１０cmの正
方形の柱が腐朽により１cm減肉し９cmの正方形に断面減
少すると、その断面係数は、１６７cm3 から１２２cm3
に減少する。したがって、腐朽木柱の健全柱に対する断
面係数比は、０．７３（＝１２２／１６７）である。こ
れより、腐朽木柱の曲げ強度は健全木柱に対して７３％
であることがわかる。同一形状の柱を測定するならば、
健全木柱の断面係数が一定であるので、数表を作成して
おけば測定棒の回転角から直ちに腐朽木柱の健全木柱に
対する強度比を求めることができる。The method of measuring the cross-sectional reduction due to root rot has been described above. Next, the method of estimating the strength will be described. Generally, the bending strength of a column is proportional to its section modulus from the material mechanics. For example, the section modulus Z of a square column with one side of acm is
Is given by Z = a 3/6. For example, if a square pillar with a side of 10 cm is thinned by 1 cm due to decay and the cross section is reduced to a square of 9 cm, the section modulus is 167 cm 3 to 122 cm 3
Decrease to. Therefore, the section modulus ratio of the decayed wooden pillar to the healthy pillar is 0.73 (= 122/167). From this, the bending strength of decayed wooden columns is 73% that of healthy wooden columns.
It can be seen that it is. If you want to measure columns of the same shape,
Since the section modulus of a healthy wooden pole is constant, if the number table is prepared, the strength ratio of the decayed wooden pole to the healthy wooden pole can be immediately obtained from the rotation angle of the measuring rod.
【００１５】[0015]
【発明の効果】以上述べたように本発明によれば、木柱
の強度劣化の原因である根腐れ程度を定量的に測定し、
さらに強度低下を算出できることから、点検者の勘に頼
らず合理的な腐朽診断ができる利点がある。本発明によ
る測定器の利用分野としては、通信や電力の電柱、建築
物の柱などの腐朽点検がある。As described above, according to the present invention, the degree of root rot, which is the cause of the strength deterioration of wooden poles, is quantitatively measured,
Furthermore, since strength deterioration can be calculated, there is an advantage that rational diagnosis of decay can be performed without relying on the intuition of the inspector. The field of use of the measuring device according to the present invention is the inspection of decay of communication and power utility poles, building poles and the like.
【図１】本発明の構成部品の一例を示す斜視図である。FIG. 1 is a perspective view showing an example of a component of the present invention.
【図２】本発明に係るガイドの一例を示す構成図であ
る。FIG. 2 is a configuration diagram showing an example of a guide according to the present invention.
【図３】本発明木柱腐朽度測定器の使用方法の一例を示
す斜視図である。FIG. 3 is a perspective view showing an example of how to use the wooden pole decay degree measuring instrument of the present invention.
【図４】本発明木柱腐朽度測定器の使用方法の一例を示
す斜視図である。FIG. 4 is a perspective view showing an example of how to use the wooden pole decay degree measuring instrument of the present invention.
【図５】本発明に係る測定器、木柱、地面の位置関係の
一例を示す構成図である。FIG. 5 is a configuration diagram showing an example of a positional relationship between a measuring instrument, a wooden pole, and the ground according to the present invention.
【図６】本発明における地中部の腐朽層厚さの測定原理
を示す説明図である。FIG. 6 is an explanatory diagram showing the principle of measuring the decay layer thickness in the ground according to the present invention.
【図７】丸型木柱の一般的腐朽形態の断面図である。FIG. 7 is a cross-sectional view of a general decay mode of a round wooden pole.
【図８】丸形木柱の健全部断面と内部腐朽を有する断面
の超音波伝播経路の比較を示す説明図である。FIG. 8 is an explanatory diagram showing a comparison of ultrasonic wave propagation paths in a healthy section cross section of a round wooden pole and a cross section having internal decay.
【図９】矩形木柱の超音波伝播時間を示す説明図であ
る。FIG. 9 is an explanatory diagram showing an ultrasonic wave propagation time of a rectangular wooden pole.
１１…測定棒、１２…折り曲げ部、１３…把手、１４…
角度指示針、１５…ガイド、１６…測定棒拘束溝、１７
…角度表示板、１８…クランプ、１９…固定当接部、２
０…可動当接部、２１…把手、２２…押え板、２３…矩
形木柱。11 ... Measuring rod, 12 ... Bent portion, 13 ... Handle, 14 ...
Angle indicating needle, 15 ... Guide, 16 ... Measuring rod restraining groove, 17
... Angle display plate, 18 ... Clamp, 19 ... Fixed contact part, 2
0 ... Movable contact part, 21 ... Handle, 22 ... Holding plate, 23 ... Rectangular wooden pole.
Claims (1)
が矩形の木柱の、地中に位置する部分の腐朽の程度を検
出する木柱腐朽度測定器において、 前記測定器が、円柱棒の先端が折り曲げられた測定棒
と、該測定棒の回動を保持した状態で該測定棒の一部を
収納する溝を有してなるガイドと、該測定棒を収納した
該ガイドを前記木柱の表面に固定するクランプからな
り、かつ該測定棒には棒の回転の角度指示針を有し、該
ガイドには角度表示板を有してなることを特徴とする木
柱腐朽度測定器。1. A wooden pole decay degree measuring instrument for detecting a degree of decay of a portion of a wooden pole having a rectangular cross section, at least a portion of which is located in the ground, wherein the measuring instrument is a cylinder. The measuring rod having the tip of the rod bent, a guide having a groove for accommodating a part of the measuring rod in a state where the measuring rod is kept rotating, and the guide accommodating the measuring rod are described above. Measuring the degree of decay of wooden poles, which comprises a clamp fixed to the surface of the wooden pole, the measuring rod has an angle indicating needle for rotation of the rod, and the guide has an angle display plate. vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03351194A JP3289468B2 (en) | 1994-03-03 | 1994-03-03 | Wooden pillar decay meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03351194A JP3289468B2 (en) | 1994-03-03 | 1994-03-03 | Wooden pillar decay meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07244044A true JPH07244044A (en) | 1995-09-19 |
| JP3289468B2 JP3289468B2 (en) | 2002-06-04 |
Family
ID=12388577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03351194A Expired - Fee Related JP3289468B2 (en) | 1994-03-03 | 1994-03-03 | Wooden pillar decay meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3289468B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2499437A (en) * | 2012-02-17 | 2013-08-21 | United Technologists Europe Ltd | Method and device for monitoring integrity of wooden posts |
-
1994
- 1994-03-03 JP JP03351194A patent/JP3289468B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2499437A (en) * | 2012-02-17 | 2013-08-21 | United Technologists Europe Ltd | Method and device for monitoring integrity of wooden posts |
| US8915155B1 (en) | 2012-02-17 | 2014-12-23 | United Technologists Europe Limited | Method and device for monitoring integrity of wooden posts |
| GB2499437B (en) * | 2012-02-17 | 2015-12-09 | United Technologists Europe Ltd | Method and device for monitoring integrity of wooden posts |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3289468B2 (en) | 2002-06-04 |
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