JPS63282601A - Method and device for inspecting inside diameter of tubular body - Google Patents
Method and device for inspecting inside diameter of tubular bodyInfo
- Publication number
- JPS63282601A JPS63282601A JP11751887A JP11751887A JPS63282601A JP S63282601 A JPS63282601 A JP S63282601A JP 11751887 A JP11751887 A JP 11751887A JP 11751887 A JP11751887 A JP 11751887A JP S63282601 A JPS63282601 A JP S63282601A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- magnet
- insertion member
- inner diameter
- tubular body
- 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
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000003780 insertion Methods 0.000 claims abstract description 47
- 230000037431 insertion Effects 0.000 claims abstract description 47
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000007689 inspection Methods 0.000 claims abstract description 12
- 230000005291 magnetic effect Effects 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 230000005294 ferromagnetic effect Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野Ｊ
この発明は、管体の内径を検査する方法および装置に関
し、特に内部に電線を布設するポリエチレン、塩化ビニ
ール等の高分子材料からなる管体の検査に有効な管体の
内径検査方法および装置に関するものである。Detailed Description of the Invention: "Industrial Field of Application J This invention relates to a method and apparatus for inspecting the inner diameter of a pipe body, and particularly to a pipe body made of a polymeric material such as polyethylene or vinyl chloride, in which electric wires are laid. The present invention relates to a method and device for inspecting the inner diameter of a tube body, which is effective for inspecting the inner diameter of a tube.
「従来の技術」
一般に、内部にケーブル等を布設する管体（以下ケーブ
ル用管体という）においては、その内径寸法を保証する
ことは非常に重要である。これは、内部に流体を通す管
体と岡なり、内径が所定の寸法より小さいと、ケーブル
を通すことができなくなるからである
ところで、一般に管体の内径を検査するにはその両端の
断面寸法を測定する手段が行なわれている。ところが、
この手段は、管体の中央部分の測定ができないため、前
記ケーブル用管体のように、内径をその長手方向にわた
って測定する必要があるものには適用できないという欠
点かあった。"Prior Art" Generally, it is very important to guarantee the inner diameter of a tube in which a cable or the like is laid (hereinafter referred to as a cable tube). This is because the inner diameter of the tube is smaller than a specified size, making it impossible to pass the cable through.In general, when inspecting the inner diameter of a tube, it is necessary to measure the cross-sectional dimensions of both ends. Measures have been taken to measure the However,
This method has the disadvantage that it cannot be applied to a tube for a cable where it is necessary to measure the inner diameter along its length because it cannot measure the central portion of the tube.
そこで、このようなケーブル用管体の内径を測定する手
段として、エックス線を用いる手段が考えられている。Therefore, a method using X-rays has been considered as a means for measuring the inner diameter of such a cable tube.
この手段は、管体に軟エックス線をその長手方向にわた
って照射し、その投影像から内径を測定しようとするも
のである。This method aims to irradiate the tube with soft X-rays over its longitudinal direction and measure the inner diameter from the projected image.
［発明が解決しようとする問題点Ｊ
ところで、上記の管体の内径検査手段にあっては、エッ
クス線によって高分子材料が架橋してしまい、変質する
恐れがあるという問題点があった。[Problem to be Solved by the Invention J] By the way, the above tube inner diameter inspection means has a problem in that the polymeric material may be crosslinked by X-rays, leading to deterioration in quality.
また、エックス線の照射方向を多数設定しないと正確な
測定ができず、このため高価な装置を多数必要とし測定
コストが高くつくという問題点があった。すなわち、エ
ックス線Ｘを２方向から照射する場合を考えてみると、
第１４図に示すような断面円形状の管体Ａと第１５図に
示すような断面正方形状に変形した管体Ｂとでは、その
投影面、に生じる映像ａ１映像すが同じになってしまい
区別ができない。このため、多数の方向からエックス線
を照射しなければならず、したがって高価なエックス線
照射装置を多数必要とするのである。Furthermore, accurate measurements cannot be made unless a large number of X-ray irradiation directions are set, which leads to the problem that a large number of expensive devices are required and the measurement cost is high. In other words, if we consider the case where X-rays are irradiated from two directions,
Tube A with a circular cross section as shown in FIG. 14 and tube B with a square cross section as shown in FIG. 15 produce the same image a1 on their projection planes. I can't tell the difference. For this reason, X-rays must be irradiated from many directions, and therefore a large number of expensive X-ray irradiation devices are required.
「問題点を解決するための手段」
この発明は、上記の問題点を解決するためになされたも
ので、第１の発明では、管体の管内に磁石に引き付けら
れる材料からなる挿入部材を配置し、前記管体の管外で
前記挿入部材に対向する位置に磁石を配置して、前記磁
石に対して前記管体をその軸線方向に移動させるように
したものであり、第２の発明では、管体の管内に磁石に
引き付けられる材料からなる挿入部材を配置し、前記管
体の管外で前記挿入部材に対向する位置に磁石を配置し
、この磁石に前記管体の軸線方向に加わる力を測定する
力測定手段を設けた構成であり、第３の発明では、管体
の管内に磁石に引き付けられる材料からなる挿入部材を
配置し、前記管体の管外で前記挿入部材に対向する位置
に磁石を配置するとともに、前記管体の管外にコイルを
配置し、このコイルにこのコイルのインダクタンスの変
動を測定するインダクタンス測定手段を設けた構成であ
る。"Means for Solving the Problems" This invention has been made to solve the above problems, and in the first invention, an insertion member made of a material that is attracted to a magnet is disposed inside the tube of the tube. In the second aspect of the present invention, a magnet is disposed outside the tube at a position facing the insertion member, and the tube is moved in the axial direction with respect to the magnet. , an insertion member made of a material that is attracted to a magnet is placed inside the tube of the tube, a magnet is placed outside the tube of the tube at a position opposite to the insertion member, and the magnet is applied to the magnet in the axial direction of the tube. In the third invention, an insertion member made of a material that is attracted to a magnet is arranged inside the tube of the tube, and the insertion member is opposed to the insertion member outside the tube of the tube. In this structure, a magnet is disposed at a position where a magnet is disposed, a coil is disposed outside the tube, and an inductance measuring means for measuring fluctuations in inductance of the coil is provided on this coil.
「作用」
この発明は、第１の発明では、管体の管内に磁石に引き
付けられる材料からなる挿入部材を配置し、前記管体の
管外で前記挿入部材に対向する位置に磁石を配置して、
前記磁石に対して前記管体をその軸線方向に移動させる
ようにしているから、前記磁石に引き寄せられた前記挿
入部材が、面記管体内に引っ掛かるかどうかで前記管体
の内径を検査することができ、したがって確実容易に管
体の検査を行うことができる。また、第２の発明では、
管体の管内に磁石に引き付けられる材料からなる挿入部
材を配置し、前記管体の管外で前記挿入部材に対向する
位置に磁石を配置し、この磁石に前記管体の軸線方向に
加わる力を測定する力測足手段を設けているから、前記
磁石に張力が加わった時に前記磁石の直前に位置してい
た前記管体の部分に内径の狭い部分があることを検出す
ることができる。さらに、第３の発明では、管体の管内
に磁石に引き付けられる材料からなる挿入部材を配置し
、前記管体の管外で前記挿入部材に対向する位置に磁石
を配置するとともに、前記管体の管外にコイルを配置し
、このコイルにこのコイルのインダクタンスの変動を測
定するインダクタンス測定手段を設けているから、イン
ダクタンスの変化があった時に前記コイルの直前に位置
していた前記管体の部分に内径の狭い部分があることを
検出することができる。"Operation" In the first aspect of the present invention, an insertion member made of a material that is attracted to a magnet is arranged inside a tube of a tube, and a magnet is arranged outside the tube of the tube at a position facing the insertion member. hand,
Since the tubular body is moved in the axial direction relative to the magnet, the inner diameter of the tubular body can be inspected by checking whether the insertion member attracted by the magnet is caught inside the marked tubular body. Therefore, the pipe body can be inspected reliably and easily. Moreover, in the second invention,
An insertion member made of a material that is attracted to a magnet is placed inside the tube of the tube, a magnet is placed outside the tube at a position facing the insertion member, and a force is applied to the magnet in the axial direction of the tube. Since a force measuring means is provided for measuring , it is possible to detect that there is a narrow portion of the inner diameter in the portion of the tubular body located immediately in front of the magnet when tension is applied to the magnet. Furthermore, in a third invention, an insertion member made of a material that is attracted to a magnet is arranged inside the tube of the tube, a magnet is arranged outside the tube of the tube at a position facing the insertion member, and A coil is placed outside the tube, and this coil is equipped with an inductance measuring means for measuring changes in the inductance of the coil, so when there is a change in inductance, the coil located just before the coil is It is possible to detect that a portion has a narrow inner diameter.
「実施例Ｊ
以下、この発明の実施例について第１図ないし第１３図
を参照して説明する。Embodiment J An embodiment of the present invention will be described below with reference to FIGS. 1 to 13.
第１図は、この発明に係る管体の内径検査方法に用いら
れる管体の内径測定装置を示すものである。この内径検
査装置は、断面円形状のパイプ（管体）ＩＩの一端部１
１ａの内部にマンドレル（挿入部材）１２を備えている
。このマンドレル１２は、鉄、コバルト、ニッケル、あ
るいはこれらを含む合金、フェライト等の強磁性体、ま
たは永久磁石から構成されている。このマンドレル１２
は、球状に形成されており、その外径は前記パイプ１１
の許容内径寸法の最小値になされている。FIG. 1 shows an apparatus for measuring the inner diameter of a tube used in the method for inspecting the inner diameter of a tube according to the present invention. This inner diameter inspection device is a pipe (pipe body) II having a circular cross section.
A mandrel (insertion member) 12 is provided inside 1a. The mandrel 12 is made of iron, cobalt, nickel, or an alloy containing these, a ferromagnetic material such as ferrite, or a permanent magnet. This mandrel 12
is formed into a spherical shape, and its outer diameter is the same as the pipe 11.
The minimum allowable inner diameter dimension has been set.
一方、前記パイプ１１の外周面近傍で前記マンドレル１
２が配置されている位置には、２つの磁石１３．１３が
配設されている。この２つの磁石１３．１３は、前記パ
イプ＋１をはさんで反対側に位置している。そして、こ
れら２つの磁石１３゜１３は、永久磁石または電磁石か
らなり、パイプ１１側の極性が互いに逆になるように、
すなわち一方の磁石１３のバイブ１１側の極性がＮであ
れば他方の磁石１３のパイプ１１側の極性がＳであるよ
うに配設されている。On the other hand, near the outer peripheral surface of the pipe 11, the mandrel 1
Two magnets 13.13 are arranged at the position where 2 is arranged. These two magnets 13.13 are located on opposite sides of the pipe +1. These two magnets 13° 13 are made of permanent magnets or electromagnets, and are arranged so that the polarities on the pipe 11 side are opposite to each other.
That is, if the polarity of one magnet 13 on the vibrator 11 side is N, the polarity of the other magnet 13 on the pipe 11 side is S.
このような測定装置を用いてパイプ１１の内径を測定す
るには、まず前記パイプＩＩを軸方向に移動させる。す
ると、前記マンドレル１２は、前記磁石１３．１３の磁
力によって引き留められ、前記パイプ１１の内部を前記
一端部１１ａから他端部１１ｂに向って相対的に移動す
る。そして、前記パイプ１１の前記他端部１１ｂが前記
磁石１３．１３の前を通過すると、前記マンドレル１２
は前記管体１１の他端から排出される。このようにして
、前記パイプ１１の内径がその長手方向にわたって前記
マンドレル１２の外径より大きいことが保証される。To measure the inner diameter of the pipe 11 using such a measuring device, first the pipe II is moved in the axial direction. Then, the mandrel 12 is held in place by the magnetic force of the magnets 13.13, and moves relatively inside the pipe 11 from the one end 11a to the other end 11b. Then, when the other end 11b of the pipe 11 passes in front of the magnet 13.13, the mandrel 12
is discharged from the other end of the tube body 11. In this way it is ensured that the inner diameter of the pipe 11 is greater than the outer diameter of the mandrel 12 over its longitudinal direction.
一方、もし第２図に示すように、パイプ１１に内径の狭
い部分１１ｃがあると、この狭い部分ｌｌｃで前記マン
ドレル１２が引っ掛かる。このため、前記パイプ１１の
他端部１１ｂが前記磁石１３．１３の前を通過しても、
前記マンドレルＩ２は排出されない。このことから、前
記パイプ１１には、その内径か前記マンドレル１２の外
径より小さい部分が存在することが判明する。On the other hand, if the pipe 11 has a narrow portion 11c with a narrow inner diameter as shown in FIG. 2, the mandrel 12 will be caught in this narrow portion llc. Therefore, even if the other end 11b of the pipe 11 passes in front of the magnet 13.13,
Said mandrel I2 is not ejected. From this, it is clear that there is a portion of the pipe 11 whose inner diameter is smaller than the outer diameter of the mandrel 12.
このようにして、前記パイプ１１の内径が内径の許容最
小値より大きいか否かを判定することができる。In this way, it can be determined whether the inner diameter of the pipe 11 is larger than the minimum allowable inner diameter.
このように、この管体の内径検査方法にあっては、パイ
プ１１の管内に強磁性体からなるマンドレル１２を配置
し、前記パイプ１１の管外で前記マンドレル１２に対向
する位置に磁石１３．１３を配置して、前記磁石１３．
１３に対して前記パイプ１１をその軸線方向に移動させ
るようにしているから、前記磁石１３に引き寄せられた
前記マンドレル１２が、前記パイプ１１内に引っ掛かる
かどうかで前記パイプ１１の内径が、前記マンドレル１
２の外径より大きいか否かを判定することができ、した
がって確実容易にパイプ１１の内径検査を行うことかで
きる。As described above, in this method for inspecting the inner diameter of a pipe body, a mandrel 12 made of a ferromagnetic material is placed inside the pipe 11, and a magnet 13. 13, and the magnet 13.
Since the pipe 11 is moved in the axial direction with respect to the magnet 13, the inner diameter of the pipe 11 is determined by whether or not the mandrel 12 attracted by the magnet 13 is caught inside the pipe 11. 1
It is possible to determine whether or not the outer diameter of the pipe 11 is larger than the outer diameter of the pipe 11. Therefore, the inner diameter of the pipe 11 can be inspected reliably and easily.
次に、本発明の他の実施例について説明する。Next, other embodiments of the present invention will be described.
なお、これらの実施例において、上記実施例と同一構成
の部分には同一符号を付して、その説明を省略する。ま
た、以下の実施例においても、上記実施例と同様の効果
を奏するのは勿論である。In addition, in these embodiments, the same reference numerals are given to the parts having the same configuration as in the above embodiment, and the explanation thereof will be omitted. Further, it goes without saying that the following embodiments also provide the same effects as the above embodiments.
第３図は、この発明に係る管体の内径検査装置を示す図
である。この管体の内径検査装置にあっては、磁石１３
．１３にパイプ１１の軸線方向に加わる力を測定する張
力計（力測定手段）２１が設けられている。このような
構成において、第４図に示すように、パイプＬ【の内径
がマンドレル１２の外径より小さい部分Ｌｌｃがあると
、前記マンドレル１２が引っ掛かって移動する。その結
果、前記磁石１３．１３に力が加わり、この力が前記張
力計２１．２１によって測定される。このようにして、
磁石１３．１３に張力が加わった時に磁石１３．１３の
直前に位置していた部分に内径が狭い部分１１ｃがある
ことを検出することができる。FIG. 3 is a diagram showing an apparatus for inspecting the inner diameter of a tubular body according to the present invention. In this tube inner diameter inspection device, the magnet 13
．． 13 is provided with a tension meter (force measuring means) 21 for measuring the force applied in the axial direction of the pipe 11. In such a configuration, as shown in FIG. 4, if there is a portion Llc where the inner diameter of the pipe L is smaller than the outer diameter of the mandrel 12, the mandrel 12 will be caught and moved. As a result, a force is exerted on said magnet 13.13, which force is measured by said tension meter 21.21. In this way,
It is possible to detect that there is a portion 11c with a narrow inner diameter in the portion located immediately in front of the magnet 13.13 when tension is applied to the magnet 13.13.
第５図は、この発明に係る他の管体の内径検査装置を示
す図である。この管体の内径検査装置には、コイル３１
が設けられている。このコイル３１は、前記磁石１３．
１３より前記パイプ１１の進行方向前方側に位置してお
り、前記パイプ１１が前方に移動した時に前記パイプ１
１の外周面近傍に位置するように配設されている。この
コイル３１には、ブリツノ等のコイルのインダクタンス
を測定するインダクタンス測定装置（インダクタンス測
定手段）３２が接続されている。このような構成におい
て、第６図に示すように、パイプ１１の内径がマンドレ
ル１２の外径より小さい部分１１ｃがあると、前記マン
ドレル１２が引っ掛かって前方へ移動する。そして、前
記マンドレル１２が前記コイル３１の直前を通過すると
、前記コイル３１のインダクタンスが変化し、この変化
を前記インダクタンス測定装置３２が検知する。このよ
うにして、インダクタンスの変化があった時に前記コイ
ル３１の直前に位置していた部分に内径の狭い部分１１
ｃがあることを検出することができる。FIG. 5 is a diagram showing another tube inner diameter inspection device according to the present invention. This pipe body inner diameter inspection device includes a coil 31
is provided. This coil 31 is attached to the magnet 13.
13 in the forward direction of the pipe 11, and when the pipe 11 moves forward, the pipe 1
It is arranged so as to be located near the outer circumferential surface of 1. This coil 31 is connected to an inductance measuring device (inductance measuring means) 32 that measures the inductance of a coil such as a Britno. In such a configuration, as shown in FIG. 6, if there is a portion 11c in which the inner diameter of the pipe 11 is smaller than the outer diameter of the mandrel 12, the mandrel 12 will be caught and moved forward. Then, when the mandrel 12 passes just in front of the coil 31, the inductance of the coil 31 changes, and the inductance measuring device 32 detects this change. In this way, when there is a change in inductance, the part 11 with a narrow inner diameter is placed in the part located immediately in front of the coil 31.
The presence of c can be detected.
第７図は、この発明に係る他の管体の内径検査装置を示
す図である。この管体の内径検査装置は、パイプ１１内
に外径の異なる大径マンドレル（挿入部材）４１と小径
マンドレル（挿入部材）４２が挿入されており、前記大
径マンドレル４１が前記パイプ１１の進行方向前方側に
、前記小径マンドレル４２が前記パイプ１１の進行方向
後方側に、それぞれ配設されている。そして、前記パイ
プｌｌの外側で、前記大径マンドレル４１と前記小径マ
ンドレル４２が配置されている位置には、それぞれ前方
磁石（磁石）４３．４３、後方磁石（磁石）４４．４４
が配設されている。このような構成ににおいて、前記パ
イプ１１をその軸方向に移動させ、どのマンドレルが引
っ掛かるかによってその内径を判定する。すなわち、第
８図に示すように、大径マントレール４１がパイプ１１
内で引っ掛からず通過した場合には、前記パイプＩＩの
最小内径は前記大径マンドレル４１の外径より大きいこ
とが検出される。また、第９図に示すように、前記大径
マンドレル４１が引っ掛かり、前記小径マンドレル４２
が引っ掛からず通過した場合には、前記パイプ１１の最
小内径は前記大径マンドレル４１の外径より小さくかつ
前記小径マンドレル４２の外径より大きいことが検出さ
れる。さらに、第１０図に示すように、前記小径マンド
レル４２が引っ掛かった場合には、前記パイプ１１の最
小内径は前記小径マンドレル４２の外径より小さいこと
が検出される。このようにして、前記パイプｌｌの最小
内径をある範囲をもって判定することができる。FIG. 7 is a diagram showing another tube inner diameter inspection device according to the present invention. This pipe body inner diameter inspection device has a large diameter mandrel (insertion member) 41 and a small diameter mandrel (insertion member) 42 having different outer diameters inserted into a pipe 11. The small-diameter mandrel 42 is disposed on the forward side in the direction of travel, and the small-diameter mandrel 42 is disposed on the rear side in the traveling direction of the pipe 11, respectively. On the outside of the pipe 11, a front magnet (magnet) 43.43 and a rear magnet (magnet) 44.44 are located at the positions where the large-diameter mandrel 41 and the small-diameter mandrel 42 are arranged, respectively.
is installed. In such a configuration, the pipe 11 is moved in its axial direction, and its inner diameter is determined based on which mandrel is caught. That is, as shown in FIG.
If the pipe passes through without being caught inside, it is detected that the minimum inner diameter of the pipe II is larger than the outer diameter of the large diameter mandrel 41. Further, as shown in FIG. 9, the large diameter mandrel 41 is caught and the small diameter mandrel 42 is caught.
If the pipe passes through without being caught, it is detected that the minimum inner diameter of the pipe 11 is smaller than the outer diameter of the large diameter mandrel 41 and larger than the outer diameter of the small diameter mandrel 42. Furthermore, as shown in FIG. 10, when the small diameter mandrel 42 is caught, it is detected that the minimum inner diameter of the pipe 11 is smaller than the outer diameter of the small diameter mandrel 42. In this way, the minimum inner diameter of the pipe 11 can be determined within a certain range.
なお、上記実施例においては、マンドレルは球状に形成
されているが、これに限る必要はなく、第１１図に示す
ように、円柱状に形成されたマンドレル（挿入部材）５
１でもよく、また、第１２図に示すように、その一端部
が中央部から離間するにしたがい縮径する弾頭状に形成
されたマンドレル（挿入部材）５２でもよく、また、第
１３図に示すように、その両端部がその中央部から離間
するにしたがい縮径するように形成されたマンドレル（
挿入部材）５３でもよい。In the above embodiment, the mandrel is formed in a spherical shape, but it is not limited to this. As shown in FIG. 11, a mandrel (insertion member) 5 formed in a cylindrical shape
1, as shown in FIG. 12, or a mandrel (insertion member) 52 having one end formed in the shape of a warhead whose diameter decreases as it moves away from the center, or as shown in FIG. 13. A mandrel (
Insert member) 53 may also be used.
また、上記実施例においては、マンドレルは１個または
２個設けられているが、これに限る必要はなく、３個以
上設けてもよい。Further, in the above embodiments, one or two mandrels are provided, but there is no need to limit the number of mandrels to this, and three or more mandrels may be provided.
「発明の効果」
以上に説明したように、この発明によれば、第１の発明
では、管体の管内に磁石に引き付けられる材料からなる
挿入部材を配置し、前記管体の管外で前記挿入部材に対
向する位置に磁石を配置して、前記磁石に対して前記管
体をその軸線方向に移動させるようにしているから、訂
記磁石に引き寄せられた前記挿入部材が、前記管体内に
引っ掛かるかどうかで前記管体の内径を判定することが
でき、したがって確実容易に管体の検査を行うことかで
きるという効果が得られる。また、第２の発明では、管
体の管内に磁石に引き付けられる材料からなる挿入部材
を配置し、前記管体の管外で前記挿入部材に対向する位
置に磁石を配置し、この磁石に前記管体の軸線方向に加
わる力を測定する力測定手段を設けているから、前記磁
石に張力が加わった時に前記磁石の直前に位置していた
前記管体の部分に内径が狭い部分があることを検出する
ことができるという効果が得られる。さらに、第３の発
明では、管体の管内に磁石に引き付けられる材料からな
る挿入部材を配置し、前記管体の管外で前記挿入部材に
対向する位置に磁石を配置するとともに、前記管体の管
外にコイルを配置し、このコイルにこのコイルのインダ
クタンスの変動を測定するインダクタンス測定手段を設
けているから、インダクタンスの変化があった時に前記
コイルの直前？こ位置していた前記管体の部分に内径の
狭い部分があることを検出することができるという効果
が得られる。"Effects of the Invention" As explained above, according to the first invention, an insertion member made of a material that is attracted to a magnet is disposed inside the tube of the tube, and the insertion member is placed outside the tube of the tube. Since a magnet is disposed at a position facing the insertion member and the tube is moved in its axial direction with respect to the magnet, the insertion member attracted by the correction magnet is moved into the tube. The inner diameter of the tubular body can be determined based on whether or not the tubular body is caught, thus providing the effect that the tubular body can be inspected reliably and easily. Further, in the second invention, an insertion member made of a material that is attracted to a magnet is arranged inside the tube of the tube, a magnet is arranged outside the tube of the tube at a position opposite to the insertion member, and the magnet is attached to the Since a force measuring means is provided to measure the force applied in the axial direction of the tube, it is possible that when tension is applied to the magnet, there is a portion of the tube that is located immediately in front of the magnet and has a narrow inner diameter. This has the effect that it is possible to detect. Furthermore, in a third invention, an insertion member made of a material that is attracted to a magnet is arranged inside the tube of the tube, a magnet is arranged outside the tube of the tube at a position facing the insertion member, and A coil is placed outside the tube, and this coil is equipped with an inductance measuring means for measuring fluctuations in inductance of this coil, so when there is a change in inductance, what happens immediately before the coil? An effect can be obtained in that it is possible to detect that there is a narrow portion of the inner diameter in the portion of the tubular body where the tube body was located.
第１図および第２図は本発明の一実施例を示す図であっ
て、第１図はその断面図、第２図はマンドレルが内径の
小さい部分に引っ掛かった状態を示す断面図、第３図お
よび第４図は他の一実施例を示す図であって、第３図は
その断面図、第４図はマンドレルが内径の小さい部分に
引っ掛かった状態を示す断面図、第５図および第６図は
さらに他の一実施例を示す図であって、第５図はその断
面図、第６図はマンドレルが内径の小さい部分に引っ掛
かった状態を示す断面図、第７図ないし第１Ｏ図は他の
実施例を示す図であって、第７図はその断面図、第８図
は大径マンドレルと小径マンドレルとか共にパイプ内を
通過した状態を示す断面図、第９図は大径マンドレルが
パイプ内で引っ掛かり小径マンドレルがパイプ内を通過
し゛た状態を示す断面図、第１０図は大径マンドレルと
小径マンドレルの双方がパイプ内で引っ掛かった状態を
示す断面図、第１１図ないし第１３図は他の形状を有す
るマンドレルをそれぞれ示す断面図、第１４図および第
１５図は従来の管体の内径検査方法を示す図である。
１１・・・・・・パイプ（管体）、１２・・・・・・マ
ンドレル（挿入部材）、Ｉ３・・・・・・磁石、２１・
・・・・・張力計（力測定手段）、３１・・・・・・コ
イル、３２・・・・・・インダクタンス測定装置（イン
ダクタンス測定手段）、４１・・・・・大径マンドレル
（挿入部材）、４２・・・・・小径マンドレル（挿入部
材）、４３・・・・・・前方磁石（磁石）、４４・・・
・・・後方磁石（磁石）、５１・・・・・マンドレル（
挿入部材）、５２・・・・・マンドレル（挿入部材）、
５３・・・・・・マンドレル（挿入部材）。1 and 2 are views showing one embodiment of the present invention, in which FIG. 1 is a cross-sectional view thereof, FIG. 2 is a cross-sectional view showing a state in which the mandrel is caught in a portion with a small inner diameter, and FIG. 3 and 4 are views showing another embodiment, in which FIG. 3 is a sectional view thereof, FIG. 4 is a sectional view showing a state in which the mandrel is caught in a portion with a small inner diameter, and FIGS. FIG. 6 is a diagram showing still another embodiment, FIG. 5 is a sectional view thereof, FIG. 6 is a sectional view showing a state in which the mandrel is caught in a portion with a small inner diameter, and FIGS. 7 to 1O. 7 is a cross-sectional view thereof, FIG. 8 is a cross-sectional view showing a state where both a large-diameter mandrel and a small-diameter mandrel have passed through the pipe, and FIG. 9 is a cross-sectional view of the large-diameter mandrel. 10 is a cross-sectional view showing a state in which both a large-diameter mandrel and a small-diameter mandrel are caught in the pipe, and FIGS. 11 to 13 The figures are cross-sectional views showing mandrels having other shapes, and FIGS. 14 and 15 are views showing a conventional method for inspecting the inner diameter of a tube body. 11... Pipe (tubular body), 12... Mandrel (insertion member), I3... Magnet, 21...
...Tension meter (force measuring means), 31 ... Coil, 32 ... Inductance measuring device (inductance measuring means), 41 ... Large diameter mandrel (insertion member) ), 42... Small diameter mandrel (insertion member), 43... Front magnet (magnet), 44...
... Rear magnet (magnet), 51 ... Mandrel (
(insertion member), 52...mandrel (insertion member),
53... Mandrel (insertion member).
Claims (9)
挿入部材を配置し、前記管体の管外で前記挿入部材に対
向する位置に磁石を配置して、前記磁石に対して前記管
体をその軸線方向に移動させることを特徴とする管体の
内径検査方法。(1) An insertion member made of a material that is attracted to a magnet is placed inside the tube of the tube, a magnet is placed outside the tube of the tube at a position facing the insertion member, and the tube is placed in relation to the magnet. A method for inspecting the inner diameter of a tube, characterized by moving the tube in its axial direction.
に形成されていることを特徴とする特許請求の範囲第１
項記載の管体の内径検査方法。(2) Claim 1, wherein the insertion member is formed in a spherical, cylindrical, or warhead shape.
Method for inspecting the inner diameter of a tube described in Section 1.
からなり、これらマンドレルはその外径が前記管体の進
行方向に順次大きくなるように配置されていることを特
徴とする特許請求の範囲第１項記載の管体の内径検査方
法。(3) The insertion member is made up of a plurality of mandrels having different outer diameters, and these mandrels are arranged so that the outer diameters of the mandrels gradually increase in the direction of movement of the tubular body. 2. The method for inspecting the inner diameter of a tube according to item 1.
挿入部材を配置し、前記管体の管外で前記挿入部材に対
向する位置に磁石を配置し、この磁石に前記管体の軸線
方向に加わる力を測定する力測定手段を設けたことを特
徴とする管体の内径検査装置。(4) An insertion member made of a material that is attracted to a magnet is placed inside the tube of the tube, a magnet is placed outside the tube at a position facing the insertion member, and the magnet is placed in the direction of the axis of the tube. An apparatus for inspecting the inner diameter of a tube, characterized in that it is provided with a force measuring means for measuring the force applied to the tube.
に形成されていることを特徴とする特許請求の範囲第４
項記載の管体の内径検査装置。(5) Claim 4, wherein the insertion member is formed in a spherical, cylindrical, or warhead shape.
The inner diameter inspection device for a pipe body as described in 2.
からなり、これらマンドレルはその外径が前記管体の進
行方向に順次大きくなるように配置されていることを特
徴とする特許請求の範囲第４項記載の管体の内径検査装
置。(6) The insertion member is made up of a plurality of mandrels having different outer diameters, and these mandrels are arranged so that the outer diameters of the mandrels gradually increase in the direction in which the tube moves. 5. The pipe body inner diameter inspection device according to item 4.
挿入部材を配置し、前記管体の管外で前記挿入部材に対
向する位置に磁石を配置するとともに、前記管体の管外
にコイルを配置し、このコイルにこのコイルのインダク
タンスの変動を測定するインダクタンス測定手段を設け
たことを特徴とする管体の内径検査装置。(7) An insertion member made of a material that is attracted to a magnet is placed inside the tube of the tube, a magnet is placed outside the tube of the tube at a position facing the insertion member, and a coil is placed outside the tube of the tube. An apparatus for inspecting the inner diameter of a tube, characterized in that the coil is provided with an inductance measuring means for measuring fluctuations in inductance of the coil.
に形成されていることを特徴とする特許請求の範囲第７
項記載の管体の内径検査装置。(8) Claim 7, wherein the insertion member is formed in a spherical, cylindrical, or warhead shape.
The inner diameter inspection device for a pipe body as described in 2.
からなり、これらマンドレルはその外径が前記管体の進
行方向に順次大きくなるように配置されていることを特
徴とする特許請求の範囲第７項記載の管体の内径検査装
置。(9) The insertion member is comprised of a plurality of mandrels having different outer diameters, and these mandrels are arranged so that the outer diameters of the mandrels gradually increase in the direction of movement of the tubular body. 8. The pipe body inner diameter inspection device according to item 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62117518A JPH0785005B2 (en) | 1987-05-14 | 1987-05-14 | Method and device for inspecting inner diameter of pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62117518A JPH0785005B2 (en) | 1987-05-14 | 1987-05-14 | Method and device for inspecting inner diameter of pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63282601A true JPS63282601A (en) | 1988-11-18 |
| JPH0785005B2 JPH0785005B2 (en) | 1995-09-13 |
Family
ID=14713752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62117518A Expired - Lifetime JPH0785005B2 (en) | 1987-05-14 | 1987-05-14 | Method and device for inspecting inner diameter of pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0785005B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03243809A (en) * | 1990-02-21 | 1991-10-30 | Mitsubishi Nuclear Fuel Co Ltd | Guide tube inspection device |
| US6954968B1 (en) * | 1998-12-03 | 2005-10-18 | Eric Sitbon | Device for mutually adjusting or fixing part of garments, shoes or other accessories |
| JP2008241450A (en) * | 2007-03-27 | 2008-10-09 | Showa Denko Kk | Method and device for inspecting opening diameter of disk-like substrate having circular opening part in central part |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62153504U (en) * | 1986-03-22 | 1987-09-29 |
-
1987
- 1987-05-14 JP JP62117518A patent/JPH0785005B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62153504U (en) * | 1986-03-22 | 1987-09-29 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03243809A (en) * | 1990-02-21 | 1991-10-30 | Mitsubishi Nuclear Fuel Co Ltd | Guide tube inspection device |
| US6954968B1 (en) * | 1998-12-03 | 2005-10-18 | Eric Sitbon | Device for mutually adjusting or fixing part of garments, shoes or other accessories |
| JP2008241450A (en) * | 2007-03-27 | 2008-10-09 | Showa Denko Kk | Method and device for inspecting opening diameter of disk-like substrate having circular opening part in central part |
| US7987610B2 (en) * | 2007-03-27 | 2011-08-02 | Showa Denko K.K. | Method of examining aperture diameter of disk substrate having circular aperture in central portion thereof and apparatus thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0785005B2 (en) | 1995-09-13 |
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