JP2016032490A - Tube coupling structure and introduction device - Google Patents

Tube coupling structure and introduction device Download PDF

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JP2016032490A
JP2016032490A JP2014155534A JP2014155534A JP2016032490A JP 2016032490 A JP2016032490 A JP 2016032490A JP 2014155534 A JP2014155534 A JP 2014155534A JP 2014155534 A JP2014155534 A JP 2014155534A JP 2016032490 A JP2016032490 A JP 2016032490A
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edge
tubular body
central axis
tube
outer tube
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JP6314052B2 (en
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亮太 工藤
Ryota KUDO
亮太 工藤
航 松浦
Wataru Matsuura
航 松浦
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Olympus Corp
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Olympus Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a tube coupling structure which allows a plurality of tubes to mutually achieve tension tolerance and twist tolerance.SOLUTION: The tube coupling structure 10 comprises: a first tubular body in which a basic central axis is defined; a second tubular body arranged outside the first tubular body coaxially with the basic central axis and slidable along the axial direction of the basic central axis relative to the first tubular body; an edge body formed on the first tubular body; an opening edge part 32 which is formed on the second tubular body, and which comprises a first edge part superposable on the edge body, and a second edge part formed integrally with the first edge part in an opposing manner and having smaller axial width about the basic central axis compared with the first edge part; and a coupling part which comprises a first fitting part fitted to the edge body, and a second fitting part formed integrally with the first fitting part, having smaller axial width about the basic central axis compared with the first fitting part, and held by the opening edge part 32.SELECTED DRAWING: Figure 4A

Description

この発明は、複数の管を接続する管連結構造、及び、この管連結構造を有する導入装置に関する。   The present invention relates to a pipe connection structure for connecting a plurality of pipes, and an introduction device having the pipe connection structure.

例えば特許文献1には、湾曲部の湾曲管の最も基端側の節輪に中心軸に直交する方向に貫通した貫通口を形成し、可撓管の先端の接続口金に突起を形成し、両者を嵌合させて湾曲管の基端と可撓管の先端とを連結する技術が開示されている。   For example, in Patent Document 1, a through-hole penetrating in a direction orthogonal to the central axis is formed in a node ring on the most proximal side of the bending tube of the bending portion, and a protrusion is formed on a connection base at the distal end of the flexible tube, A technique is disclosed in which both are connected to connect the proximal end of the bending tube and the distal end of the flexible tube.

特開2008−259634号公報JP 2008-259634 A

特許文献1に開示された技術では、湾曲管を中心軸に沿って先端側に、可撓管を基端側に引っ張る引っ張り力が加えられたとき、又は、両者を中心軸の軸回りに相対的に互いに反対方向にねじり力が加えられたとき、両者が連結された状態を維持するのが難しい場合が生じ得る。このため、管同士を連結したとき、高引っ張り耐性、高ねじり耐性を発揮する管連結構造が求められている。   In the technique disclosed in Patent Document 1, when a pulling force is applied to pull the flexible tube to the distal end side along the central axis and the flexible tube to the proximal end side, or both of them are relative to each other around the axis of the central axis. In other words, when torsional forces are applied in directions opposite to each other, it may be difficult to maintain the state in which the two are connected. For this reason, there is a need for a pipe connection structure that exhibits high tensile resistance and high torsion resistance when the pipes are connected.

この発明は、複数の管同士が互いに反対方向に引っ張られる際の引張耐性、及び、複数の管同士が中心軸の軸回りに互いに反対方向にねじられる際のねじり耐性を発揮することが可能な管連結構造、及び、この管連結構造を有する導入装置を提供することを目的とする。   The present invention can exhibit tensile resistance when a plurality of tubes are pulled in opposite directions to each other and torsion resistance when the plurality of tubes are twisted in opposite directions around the central axis. It is an object of the present invention to provide a pipe connection structure and an introduction device having the pipe connection structure.

この発明の一態様に係る、管連結構造は、基礎中心軸が規定される第1管状体と、前記基礎中心軸に対して同軸上に前記第1管状体の外側に配設され、前記第1管状体に対して前記基礎中心軸の軸方向に沿ってスライド可能な第2管状体と、前記第1管状体に形成された縁体と、前記縁体に位置を重ねることが可能な第1縁部と、前記第1縁部に一体的に形成され、前記第1縁部に対して前記基礎中心軸の軸回り方向の幅が小さい、互いに対向する第2縁部とを有し、前記第2管状体に形成された開口縁部と、前記縁体に嵌合される第1嵌合部と、前記第1嵌合部に一体的に形成され、前記第1嵌合部に対して前記基礎中心軸の軸回り方向の幅が小さく、前記開口縁部に保持される第2嵌合部とを有する連結体とを含む。   According to an aspect of the present invention, a pipe connection structure includes a first tubular body in which a basic center axis is defined, and is disposed on the outer side of the first tubular body coaxially with the basic central axis. A second tubular body that is slidable along the axial direction of the basic central axis with respect to the one tubular body; an edge formed on the first tubular body; and a first that can overlap the edge. A first edge part, and a second edge part formed integrally with the first edge part and having a small width in the direction around the axis of the basic central axis with respect to the first edge part; An opening edge portion formed in the second tubular body, a first fitting portion fitted to the edge body, and integrally formed with the first fitting portion, with respect to the first fitting portion And a connecting body having a second fitting portion held by the opening edge portion and having a small width in the direction around the axis of the basic center axis.

この発明によれば、複数の管同士が互いに反対方向に引っ張られる際の引張耐性、及び、複数の管同士が基礎中心軸の軸回りに互いに反対方向にねじられる際のねじり耐性を発揮することが可能な管連結構造、及び、この管連結構造を有する導入装置を提供することができる。   According to the present invention, it exhibits tensile resistance when a plurality of tubes are pulled in opposite directions to each other and torsion resistance when a plurality of tubes are twisted in directions opposite to each other around the axis of the basic central axis. It is possible to provide a pipe connection structure that can be used, and an introduction device having the pipe connection structure.

図1は、第1実施形態に係る管連結構造の内側管、外側管及び連結ピンを示す概略的な分解斜視図である。FIG. 1 is a schematic exploded perspective view showing an inner tube, an outer tube, and a connection pin of the tube connection structure according to the first embodiment. 図2Aは、管連結構造の内側管の外側に外側管を配置した状態で連結ピンを、外側管の開口縁部を通して内側管の環状縁部に配置しようとする状態を示す概略的な斜視図である。FIG. 2A is a schematic perspective view showing a state in which the connecting pin is about to be disposed on the annular edge of the inner tube through the opening edge of the outer tube with the outer tube being disposed outside the inner tube of the tube coupling structure. It is. 図2Bは、図2Aに示す内側管、外側管及び連結ピンを、内側管及び外側管の中心軸と、外側管の開口縁部の長手軸とを含む面で切断した状態を示す概略的な縦断面図である。FIG. 2B is a schematic diagram illustrating a state in which the inner tube, the outer tube, and the connection pin illustrated in FIG. 2A are cut along a plane including the central axis of the inner tube and the outer tube and the longitudinal axis of the opening edge of the outer tube. It is a longitudinal cross-sectional view. 図2Cは、図2Bの管連結構造の外側管の開口縁部と内側管の環状縁部との関係を拡大して示す概略的な縦断面図である。2C is a schematic longitudinal sectional view showing an enlarged relationship between the opening edge of the outer tube and the annular edge of the inner tube of the tube connection structure of FIG. 2B. 図3Aは、図2Aに示す連結ピンを、外側管の開口縁部を通して内側管の環状縁部に嵌合させた状態を示す概略的な斜視図である。FIG. 3A is a schematic perspective view showing a state in which the connecting pin shown in FIG. 2A is fitted to the annular edge of the inner tube through the opening edge of the outer tube. 図3Bは、図3Aに示す内側管、外側管及び連結ピンを、内側管及び外側管の中心軸と、外側管の開口縁部の長手軸とを含む面で切断した状態を示す概略的な縦断面図である。FIG. 3B is a schematic diagram illustrating a state in which the inner tube, the outer tube, and the connecting pin illustrated in FIG. 3A are cut along a plane including the central axis of the inner tube and the outer tube and the longitudinal axis of the opening edge of the outer tube. It is a longitudinal cross-sectional view. 図4Aは、図3Aに示す内側管に対して外側管を中心軸に沿って移動させて、連結ピンの外側嵌合部を外側管の開口縁部の閉塞端に当接させた状態を示す概略的な斜視図である。4A shows a state in which the outer tube is moved along the central axis with respect to the inner tube shown in FIG. 3A and the outer fitting portion of the connecting pin is brought into contact with the closed end of the opening edge of the outer tube. It is a schematic perspective view. 図4Bは、図4Aに示す内側管、外側管及び連結ピンを、内側管及び外側管の中心軸と、外側管の開口縁部の長手軸とを含む面で切断した状態を示す概略的な縦断面図である。FIG. 4B is a schematic diagram illustrating a state in which the inner tube, the outer tube, and the connection pin illustrated in FIG. 4A are cut along a plane including the central axis of the inner tube and the outer tube and the longitudinal axis of the opening edge of the outer tube. It is a longitudinal cross-sectional view. 図4Cは、図4Bの管連結構造の外側管の開口縁部、内側管の環状縁部、及び連結ピンの関係を拡大して示す概略的な縦断面図である。FIG. 4C is a schematic longitudinal sectional view showing an enlarged relationship between the opening edge of the outer tube, the annular edge of the inner tube, and the connection pin of the tube connection structure of FIG. 4B. 図4Dは、図4Bの管連結構造の外側管の開口縁部、内側管の環状縁部、及び連結ピンの関係を拡大して示す概略的な横断面図である。4D is a schematic cross-sectional view showing an enlarged relationship between the opening edge of the outer tube, the annular edge of the inner tube, and the connection pin of the tube connection structure of FIG. 4B. 図5Aは、例えば内視鏡などの導入装置を示す概略図である。FIG. 5A is a schematic diagram showing an introduction device such as an endoscope. 図5Bは、導入装置の挿入部の可撓管の螺旋管の先端と、湾曲部の湾曲管の基端とを管連結構造を用いて接続する状態を示す概略的な斜視図である。FIG. 5B is a schematic perspective view showing a state in which the distal end of the helical tube of the flexible tube of the insertion portion of the introducing device and the proximal end of the curved tube of the bending portion are connected using a tube connection structure. 図6は、連結ピンの形状の変形例を示す側面図である。FIG. 6 is a side view showing a modification of the shape of the connecting pin. 図7は、第2実施形態に係る管連結構造の内側管、外側管及び2つの連結ピンを示す概略的な分解斜視図である。FIG. 7 is a schematic exploded perspective view showing an inner tube, an outer tube, and two connecting pins of the tube connecting structure according to the second embodiment. 図8(A)は図7に示す内側管のうち第1及び第2環状縁部を含む部位を示す概略的な縦断面図であり、図8(B)は、図7に示す内側管、外側管及び連結ピンを、内側管及び外側管の中心軸と、外側管の第1及び第2開口縁部の長手軸とを含む面で切断した状態を示す概略的な縦断面図である。8A is a schematic longitudinal sectional view showing a portion including the first and second annular edges in the inner tube shown in FIG. 7, and FIG. 8B is an inner tube shown in FIG. It is a schematic longitudinal cross-sectional view which shows the state which cut | disconnected the outer tube | pipe and the connecting pin in the surface containing the central axis of an inner tube | pipe and an outer tube | pipe, and the longitudinal axis of the 1st and 2nd opening edge part of an outer tube | pipe. 図9Aは、管連結構造の内側管の外側に外側管を配置した状態で第1連結ピンを、外側管の第1開口縁部を通して内側管の第1環状縁部に配置しようとする状態を示す概略的な斜視図である。FIG. 9A shows a state where the first connecting pin is to be disposed on the first annular edge of the inner tube through the first opening edge of the outer tube with the outer tube disposed outside the inner tube of the tube coupling structure. It is a schematic perspective view shown. 図9Bは、図9Aに示す内側管、外側管及び第1連結ピンを中心軸の軸回りに180度回動させた状態を示す概略的な斜視図である。FIG. 9B is a schematic perspective view showing a state in which the inner tube, the outer tube, and the first connecting pin shown in FIG. 9A are rotated 180 degrees around the axis of the central axis. 図9Cは、図9Aに示す内側管、外側管及び第1連結ピンを、内側管及び外側管の中心軸と、外側管の第1及び第2開口縁部の長手軸とを含む面で切断した状態を示す概略的な縦断面図である。FIG. 9C cuts the inner tube, the outer tube and the first connecting pin shown in FIG. 9A on a plane including the central axes of the inner tube and the outer tube and the longitudinal axes of the first and second opening edges of the outer tube. It is a schematic longitudinal cross-sectional view which shows the state which carried out. 図10Aは、図9Aに示す第1連結ピンを、外側管の第1開口縁部を通して内側管の第1環状縁部に嵌合した状態を示す概略的な斜視図である。FIG. 10A is a schematic perspective view showing a state where the first connecting pin shown in FIG. 9A is fitted to the first annular edge of the inner tube through the first opening edge of the outer tube. 図10Bは、図10Aに示す内側管、外側管及び第1連結ピンを中心軸の軸回りに180度回動させた状態を示す概略的な斜視図である。FIG. 10B is a schematic perspective view showing a state in which the inner tube, the outer tube, and the first connecting pin shown in FIG. 10A are rotated 180 degrees around the axis of the central axis. 図10Cは、図10Aに示す内側管、外側管及び第1連結ピンを、内側管及び外側管の中心軸と、外側管の第1及び第2開口縁部の長手軸とを含む面で切断した状態を示す概略的な縦断面図である。FIG. 10C cuts the inner tube, the outer tube and the first connecting pin shown in FIG. 10A on a plane including the central axis of the inner tube and the outer tube and the longitudinal axes of the first and second open edges of the outer tube. It is a schematic longitudinal cross-sectional view which shows the state which carried out. 図11Aは、図10Aに示す内側管に対して外側管をそれらの中心軸に沿って移動させて、第1連結ピンの外側嵌合部を外側管の第1開口縁部の閉塞端に当接させた状態を示す概略的な斜視図である。FIG. 11A shows that the outer tube is moved along the central axis with respect to the inner tube shown in FIG. 10A so that the outer fitting portion of the first connecting pin contacts the closed end of the first opening edge of the outer tube. It is a schematic perspective view which shows the state made to contact. 図11Bは、図11Aに示す内側管、外側管及び第1連結ピンを中心軸の軸回りに180度回動させた状態を示し、内側管の第2環状縁部の中心軸と外側管の第2開口縁部のC字状縁部の中心軸とを一致させた状態を示す概略的な斜視図である。FIG. 11B shows a state in which the inner tube, the outer tube, and the first connecting pin shown in FIG. 11A are rotated 180 degrees around the axis of the central axis, and the central axis of the second annular edge of the inner tube and the outer tube It is a schematic perspective view which shows the state which made the center axis | shaft of the C-shaped edge part of a 2nd opening edge part correspond. 図11Cは、図11Aに示す内側管、外側管及び第1連結ピンを、内側管及び外側管の中心軸と、外側管の第1及び第2開口縁部の長手軸とを含む面で切断した状態を示す概略的な縦断面図である。FIG. 11C cuts the inner tube, the outer tube and the first connecting pin shown in FIG. 11A on a plane including the central axis of the inner tube and the outer tube and the longitudinal axes of the first and second opening edges of the outer tube. It is a schematic longitudinal cross-sectional view which shows the state which carried out. 図12Aは、第1連結ピンの外側嵌合部を外側管の開口縁部の閉塞端に当接させた状態で、第2連結ピンを外側管の第2開口縁部を通して内側管の第2環状縁部に嵌合させた状態を示す概略的な斜視図である。FIG. 12A shows the second connecting pin passing through the second opening edge of the outer tube and the second connecting pin of the inner tube with the outer fitting portion of the first connecting pin being in contact with the closed end of the opening edge of the outer tube. It is a schematic perspective view which shows the state fitted to the annular edge part. 図12Bは、図12Aに示す内側管、外側管及び第1連結ピンを中心軸の軸回りに180度回動させた状態を示し、第2連結ピンを外側管の第2開口縁部のC字状縁部を通して内側管の第2環状縁部に嵌合させた状態を示す概略的な斜視図である。FIG. 12B shows a state where the inner tube, the outer tube, and the first connecting pin shown in FIG. 12A are rotated 180 degrees around the axis of the central axis, and the second connecting pin is positioned at C of the second opening edge of the outer tube. It is a schematic perspective view which shows the state fitted to the 2nd cyclic | annular edge part of the inner side pipe | tube through the character-shaped edge part. 図12Cは、図12Aに示す内側管、外側管及び第1連結ピンを、内側管及び外側管の中心軸と、外側管の第1及び第2開口縁部の長手軸とを含む面で切断した状態を示す概略的な縦断面図である。12C cuts the inner tube, outer tube and first connecting pin shown in FIG. 12A on a plane including the central axis of the inner tube and outer tube and the longitudinal axes of the first and second open edges of the outer tube. It is a schematic longitudinal cross-sectional view which shows the state which carried out. 図13Aは、図12Aに示す内側管に対して外側管をそれらの中心軸に沿って移動させて、第2連結ピンの外側嵌合部を外側管の第2開口縁部の閉塞端に当接させたときに、第1開口縁部のC字状縁部と閉塞端との間の長孔縁部に第1連結ピンの外側嵌合部を配置した状態を示す概略的な斜視図である。FIG. 13A shows that the outer tube is moved along the central axis with respect to the inner tube shown in FIG. 12A so that the outer fitting portion of the second connecting pin is brought into contact with the closed end of the second opening edge of the outer tube. FIG. 4 is a schematic perspective view showing a state in which the outer fitting portion of the first connecting pin is disposed at the long hole edge portion between the C-shaped edge portion and the closed end of the first opening edge portion when being in contact with each other. is there. 図13Bは、図12Bに示す内側管に対して外側管をそれらの中心軸に沿って移動させて、第2連結ピンの外側嵌合部を外側管の第2開口縁部の閉塞端に当接させた状態を示す概略的な斜視図である。FIG. 13B shows that the outer tube is moved along the central axis with respect to the inner tube shown in FIG. 12B so that the outer fitting portion of the second connecting pin is brought into contact with the closed end of the second opening edge of the outer tube. It is a schematic perspective view which shows the state made to contact. 図13Cは、図13Aに示す内側管、外側管及び第1連結ピンを、内側管及び外側管の中心軸と、外側管の第1及び第2開口縁部の長手軸とを含む面で切断した状態を示す概略的な縦断面図である。13C cuts the inner tube, the outer tube and the first connecting pin shown in FIG. 13A on a plane including the central axes of the inner tube and the outer tube and the longitudinal axes of the first and second opening edges of the outer tube. It is a schematic longitudinal cross-sectional view which shows the state which carried out. 図14Aは、図13Cの管連結構造の外側管の第1開口縁部、内側管の第1環状縁部、及び、第1連結ピンの関係を拡大して示す概略的な縦断面図である。14A is a schematic longitudinal sectional view showing an enlarged relationship between the first opening edge of the outer tube, the first annular edge of the inner tube, and the first connection pin of the tube connection structure of FIG. 13C. . 図14Bは、図13Cの管連結構造の外側管の第2開口縁部、内側管の第2環状縁部、及び、第2連結ピンの関係を拡大して示す概略的な縦断面図である。14B is a schematic longitudinal sectional view showing an enlarged relationship between the second opening edge of the outer tube, the second annular edge of the inner tube, and the second connection pin of the tube connection structure of FIG. 13C. . 図14Cは、図13Aに示す外側管の第1開口縁部、内側管の第1環状縁部、及び、第1連結ピンの配置と、図13Bに示す外側管の第2開口縁部、内側管の第2環状縁部、及び、第2連結ピンの配置との、内側管及び外側管の中心軸に沿った方向の関係を示す概略図である。14C shows the arrangement of the first opening edge of the outer tube shown in FIG. 13A, the first annular edge of the inner tube, and the first connecting pin, and the second opening edge of the outer tube shown in FIG. 13B. It is the schematic which shows the relationship of the direction along the center axis | shaft of an inner tube | pipe and an outer tube | pipe with the 2nd annular edge of a pipe | tube, and arrangement | positioning of a 2nd connection pin. 図15(A)は内側管の先端に例えば内視鏡などの導入装置の挿入部の可撓管の螺旋管の先端と、湾曲部の湾曲管の基端とを管連結構造を用いて接続する状態を示す概略的な斜視図であり、図15(B)は図15(A)に示す内側管、外側管及び第1連結ピンを中心軸の軸回りに180度回動させた状態を示す概略的な斜視図である。In FIG. 15A, the distal end of the flexible tube of the insertion portion of the introducing device such as an endoscope and the proximal end of the curved tube of the bending portion are connected to the distal end of the inner tube using a tube connection structure. 15B is a schematic perspective view showing a state in which the inner tube, the outer tube and the first connecting pin shown in FIG. 15A are rotated 180 degrees around the axis of the central axis. It is a schematic perspective view shown. 図16は、第3実施形態に係る管連結構造の内側管、第1及び第2外側管、並びに、第1から第4連結ピンを示す概略的な分解斜視図である。FIG. 16 is a schematic exploded perspective view showing the inner tube, the first and second outer tubes, and the first to fourth connecting pins of the tube connecting structure according to the third embodiment. 図17Aは、第2連結ピンの外側嵌合部を外側管の第2開口縁部の閉塞端に当接させたときの第1開口縁部のC字状縁部と閉塞端との間の長孔縁部に第1連結ピンの外側嵌合部を配置した状態を示す概略的な斜視図である。FIG. 17A shows a state between the C-shaped edge of the first opening edge and the closed end when the outer fitting portion of the second connecting pin is brought into contact with the closed end of the second opening edge of the outer tube. It is a schematic perspective view which shows the state which has arrange | positioned the outer fitting part of the 1st connection pin in the long hole edge part. 図17Bは、第2連結ピンの外側嵌合部を外側管の第2開口縁部の閉塞端に当接させた状態を示す概略的な斜視図である。FIG. 17B is a schematic perspective view showing a state in which the outer fitting portion of the second connecting pin is in contact with the closed end of the second opening edge of the outer tube. 図17Cは、図17Aに示す内側管、外側管及び第1連結ピンを、内側管及び外側管の中心軸と、外側管の第1及び第2開口縁部の長手軸とを含む面で切断した状態を示す概略的な縦断面図である。FIG. 17C cuts the inner tube, the outer tube and the first connecting pin shown in FIG. 17A on a plane including the central axis of the inner tube and the outer tube and the longitudinal axes of the first and second opening edges of the outer tube. It is a schematic longitudinal cross-sectional view which shows the state which carried out. 図18Aは、内側管に第1及び第2連結ピンで第1外側管を連結した状態で、第2外側管で内側管を覆うとともに、第1外側管と第2外側管とを周方向の回動を規制するように嵌合させ、第3連結ピンを、第2外側管の第3開口縁部を通して内側管の第3環状縁部に配置しようとする状態を示す概略的な斜視図である。FIG. 18A shows a state in which the first outer tube is covered with the second outer tube in a state where the first outer tube is connected to the inner tube with the first and second connecting pins, and the first outer tube and the second outer tube are connected in the circumferential direction. FIG. 5 is a schematic perspective view showing a state where fitting is performed so as to restrict rotation and a third connecting pin is about to be disposed on a third annular edge of the inner tube through a third opening edge of the second outer tube. is there. 図18Bは、図18Aに示す内側管、第2外側管及び第3連結ピンを中心軸の軸回りに180度回動させた状態を示す概略的な斜視図である。18B is a schematic perspective view showing a state in which the inner tube, the second outer tube, and the third connecting pin shown in FIG. 18A are rotated 180 degrees around the axis of the central axis. 図18Cは、図18Aに示す内側管、第2外側管及び第3連結ピンを、内側管及び第2外側管の中心軸と、第2外側管の第3及び第4開口縁部の長手軸とを含む面で切断した状態を示す概略的な縦断面図である。18C shows the inner tube, the second outer tube, and the third connecting pin shown in FIG. 18A, the central axes of the inner tube and the second outer tube, and the longitudinal axes of the third and fourth opening edges of the second outer tube. It is a schematic longitudinal cross-sectional view which shows the state cut | disconnected by the surface containing these. 図19Aは、図18Aに示す内側管に対して第2外側管をそれらの中心軸に沿って移動させて、第3連結ピンの外側嵌合部を第2外側管の第3開口縁部の閉塞端に当接させた状態を示す概略的な斜視図である。19A moves the second outer tube along the central axis thereof with respect to the inner tube shown in FIG. 18A so that the outer fitting portion of the third connecting pin is connected to the third opening edge of the second outer tube. It is a schematic perspective view which shows the state contact | abutted to the obstruction | occlusion end. 図19Bは、図19Aに示す内側管、第2外側管及び第3連結ピンを中心軸の軸回りに180度回動させた状態を示し、内側管の第4環状縁部の中心軸と第2外側管の第4開口縁部のC字状縁部の中心軸とを一致させた状態を示す概略的な斜視図である。FIG. 19B shows a state in which the inner tube, the second outer tube, and the third connecting pin shown in FIG. 19A have been rotated 180 degrees around the axis of the central axis. It is a schematic perspective view which shows the state which made the center axis | shaft of the C-shaped edge part of the 4th opening edge part of 2 outer side tubes correspond. 図19Cは、図19Aに示す内側管、第2外側管及び第3連結ピンを、内側管及び第2外側管の中心軸と、第2外側管の第3及び第4開口縁部の長手軸とを含む面で切断した状態を示す概略的な縦断面図である。19C shows the inner tube, the second outer tube, and the third connecting pin shown in FIG. 19A, the central axes of the inner tube and the second outer tube, and the longitudinal axes of the third and fourth opening edges of the second outer tube. It is a schematic longitudinal cross-sectional view which shows the state cut | disconnected by the surface containing these. 図20Aは、図19Aに示す内側管に対して外側管をそれらの中心軸に沿って移動させて、第4連結ピンの外側嵌合部を第2外側管の第4開口縁部の閉塞端に当接させたときに、第3開口縁部のC字状縁部と閉塞端との間の長孔縁部に第3連結ピンの外側嵌合部を配置した状態を示す概略的な斜視図である。20A shows the closed end of the fourth open edge of the second outer pipe by moving the outer pipe along the central axis thereof with respect to the inner pipe shown in FIG. Is a schematic perspective view showing a state in which the outer fitting portion of the third connecting pin is disposed at the long hole edge portion between the C-shaped edge portion and the closed end of the third opening edge portion when being brought into contact with each other. FIG. 図20Bは、図19Bに示す内側管に対して第2外側管をそれらの中心軸に沿って移動させて、第4連結ピンの外側嵌合部を第2外側管の第4開口縁部の閉塞端に当接させた状態を示す概略的な斜視図である。20B moves the second outer tube along their central axes with respect to the inner tube shown in FIG. 19B so that the outer fitting portion of the fourth connecting pin is aligned with the fourth opening edge of the second outer tube. It is a schematic perspective view which shows the state contact | abutted to the obstruction | occlusion end. 図20Cは、図20Aに示す内側管、第2外側管及び第3連結ピンを、内側管及び第2外側管の中心軸と、第2外側管の第3及び第4開口縁部の長手軸とを含む面で切断した状態を示す概略的な縦断面図である。20C shows the inner tube, the second outer tube, and the third connecting pin shown in FIG. 20A, the central axes of the inner tube and the second outer tube, and the longitudinal axes of the third and fourth opening edges of the second outer tube. It is a schematic longitudinal cross-sectional view which shows the state cut | disconnected by the surface containing these. 図21は、第1外側管に例えば内視鏡などの導入装置の挿入部の第1湾曲部の湾曲管の基端を接続し、第2外側管に第2湾曲部の湾曲管の先端を接続する、管連結構造を示す概略的な斜視図である。In FIG. 21, the proximal end of the bending tube of the first bending portion of the insertion portion of the introducing device such as an endoscope is connected to the first outer tube, and the distal end of the bending tube of the second bending portion is connected to the second outer tube. It is a schematic perspective view which shows the pipe connection structure connected.

以下、図面を参照しながらこの発明を実施するための形態について説明する。   Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

まず、第1実施形態について図1から図6を用いて説明する。   First, a first embodiment will be described with reference to FIGS.

図1から図4Dに示す管連結構造10は、内側管(第1管状部材)12と、外側管(第2管状部材)14と、内側管12及び外側管14を連結する連結ピン(連結体)16とを有する。内側管12及び外側管14は、同心状(同軸上)の中心軸(基礎中心軸)C0が規定され、内側管12及び外側管14の横断面はそれぞれ円環状であることが好適である。内側管12の外径は、外側管14の内径と同じか僅かに小さく形成されている。内側管12及び外側管14は、連結ピン16が配設されていない状態で、中心軸C0に沿って相対的に移動可能であり、かつ、中心軸C0の軸回りに相対的に回転可能である。内側管12及び外側管14の中心軸C0に沿ったそれぞれの長さは、適宜に設定可能である。   A pipe connecting structure 10 shown in FIGS. 1 to 4D includes an inner pipe (first tubular member) 12, an outer pipe (second tubular member) 14, and a connecting pin (connecting body) that connects the inner pipe 12 and the outer pipe 14. 16). The inner tube 12 and the outer tube 14 have a concentric (coaxial) central axis (basic central axis) C0, and the inner tube 12 and the outer tube 14 preferably have an annular shape in cross section. The outer diameter of the inner tube 12 is the same as or slightly smaller than the inner diameter of the outer tube 14. The inner tube 12 and the outer tube 14 are relatively movable along the central axis C0 in a state where the connecting pin 16 is not disposed, and can be relatively rotated around the central axis C0. is there. The lengths of the inner tube 12 and the outer tube 14 along the central axis C0 can be set as appropriate.

図1に示すように、内側管12は、中心軸C0を規定する第1の管状体としての筒状のボディ(内側管状体)20と、ボディ20に形成された環状縁部(縁体)22を有する。ボディ20は、円管状に形成されていることが好ましい。ボディ20は一端20aと他端20bとを有する。環状縁部22は、ボディ20の一端20aと他端20bとの間の適宜の位置に形成することができる。   As shown in FIG. 1, the inner tube 12 includes a cylindrical body (inner tubular body) 20 as a first tubular body that defines a central axis C0, and an annular edge (rim body) formed in the body 20. 22. The body 20 is preferably formed in a circular tube shape. The body 20 has one end 20a and the other end 20b. The annular edge 22 can be formed at an appropriate position between the one end 20 a and the other end 20 b of the body 20.

この実施形態では、環状縁部22が中心軸C0に直交する方向に貫通するものとして説明するが、貫通せず内側管12の外周面に対して凹状に形成されていても良い。
図2Cに示すように、環状縁部22は、ボディ20のうち中心軸C0に近接する内周面側の内側縁部22aの直径が、中心軸C0に離隔する外周面側の外側縁部22bの直径に比べて小さく形成されている。特に、環状縁部22は、外周側から内周側に向かって直径が小さくなるテーパ状に形成されていることが好適である。環状縁部22は、内側管12のボディ20の厚さによっては、ザグリ加工等により形成されていることも好適である。
In this embodiment, the annular edge portion 22 is described as penetrating in a direction orthogonal to the central axis C0, but may be formed in a concave shape with respect to the outer peripheral surface of the inner tube 12 without penetrating.
As shown in FIG. 2C, the annular edge 22 has an outer edge 22b on the outer peripheral surface side in which the diameter of the inner edge 22a on the inner peripheral surface side close to the central axis C0 in the body 20 is separated from the central axis C0. It is formed smaller than the diameter. In particular, the annular edge 22 is preferably formed in a tapered shape with a diameter decreasing from the outer peripheral side toward the inner peripheral side. Depending on the thickness of the body 20 of the inner tube 12, the annular edge 22 is also preferably formed by counterboring or the like.

図1に示すように、外側管14は、中心軸C0を規定する第2の管状体としての筒状のボディ(外側管状体)30と、ボディ30に形成され中心軸C0に直交する方向に貫通する開口縁部(キー溝)32を有する。ボディ30は、円管状に形成されていることが好ましい。ボディ30は一端30aと他端30bとを有する。開口縁部32は、ボディ30の一端30aと他端30bとの間の適宜の位置に形成することができる。   As shown in FIG. 1, the outer tube 14 includes a cylindrical body (outer tubular body) 30 as a second tubular body that defines the central axis C0, and a direction formed on the body 30 and perpendicular to the central axis C0. An opening edge portion (key groove) 32 is provided. The body 30 is preferably formed in a circular tube shape. The body 30 has one end 30a and the other end 30b. The opening edge 32 can be formed at an appropriate position between the one end 30 a and the other end 30 b of the body 30.

開口縁部32は、C字状縁部(スルーホール、第1縁部)32aと、長孔縁部(対向縁部、第2縁部)32bと、閉塞端(第3縁部)32cとを一体的に有する。閉塞端32cは、長孔縁部32bを閉塞するために形成され、C字状縁部32aに対して遠位にある。この実施形態では、C字状縁部32aが外側管14のボディ30の他端30bに近接し、閉塞端32cが外側管14のボディ30の一端30aに近接している。図示しないが、C字状縁部32aが外側管14のボディ30の一端30aに近接し、閉塞端32cが外側管14のボディ30の他端30bに近接することが好適であることはもちろんである。   The opening edge 32 includes a C-shaped edge (through hole, first edge) 32a, a long hole edge (opposing edge, second edge) 32b, and a closed end (third edge) 32c. Is integrated. The closed end 32c is formed to close the slot edge 32b and is distal to the C-shaped edge 32a. In this embodiment, the C-shaped edge 32 a is close to the other end 30 b of the body 30 of the outer tube 14, and the closed end 32 c is close to one end 30 a of the body 30 of the outer tube 14. Although not shown, it is preferable that the C-shaped edge portion 32a is close to one end 30a of the body 30 of the outer tube 14 and the closed end 32c is close to the other end 30b of the body 30 of the outer tube 14. is there.

C字状縁部32aは、連結ピン16を内側管12の環状縁部22に対して出し入れするのに用いられる。C字状縁部32aは、ここでは、略円形の開口を形成している。そして、C字状縁部32aは連結ピン16の内側嵌合部42を通すことが可能な直径を有する。また、C字状縁部32aの直径は、内側管12の環状縁部22の外周面側の直径と同じか僅かに大きく形成されていることが好適である。
なお、C字状縁部32aの直径は、長孔縁部32bの中心軸C0の軸回りの周方向幅よりも大きく形成されている。言い換えると、長孔縁部32bの中心軸C0の軸回りの周方向幅は、C字状縁部32aに対して小さい。長孔縁部32bの長手軸Lは、長孔縁部32bの幅方向中央にある。長孔縁部32bの長手軸Lは、中心軸C0に平行であることが好適であるが、長手軸Lが中心軸C0に対してねじれの位置にあっても良い。長手軸Lは、C字状縁部32aの中心軸に直交する。
The C-shaped edge 32 a is used to move the connecting pin 16 in and out of the annular edge 22 of the inner tube 12. Here, the C-shaped edge portion 32a forms a substantially circular opening. The C-shaped edge portion 32a has a diameter that allows the inner fitting portion 42 of the connecting pin 16 to pass therethrough. Moreover, it is preferable that the diameter of the C-shaped edge portion 32 a is formed to be the same as or slightly larger than the diameter on the outer peripheral surface side of the annular edge portion 22 of the inner tube 12.
The diameter of the C-shaped edge 32a is larger than the circumferential width around the central axis C0 of the long hole edge 32b. In other words, the circumferential width around the axis of the central axis C0 of the long hole edge portion 32b is smaller than that of the C-shaped edge portion 32a. The longitudinal axis L of the long hole edge portion 32b is at the center in the width direction of the long hole edge portion 32b. The longitudinal axis L of the long hole edge portion 32b is preferably parallel to the central axis C0, but the longitudinal axis L may be in a twisted position with respect to the central axis C0. The longitudinal axis L is orthogonal to the central axis of the C-shaped edge portion 32a.

長孔縁部32bは、互いに対向する1対の縁部により形成されている。1対の縁部は平行であることが好適である。長孔縁部32bのうち、長手軸Lに直交する幅(中心軸C0の軸回り方向の幅)は、連結ピン16の後述する外側嵌合部44の直径と同じかそれよりも僅かに大きく形成されている。   The long hole edge portion 32b is formed by a pair of edge portions facing each other. The pair of edges is preferably parallel. Of the long hole edge portion 32b, the width orthogonal to the longitudinal axis L (the width in the direction around the central axis C0) is the same as or slightly larger than the diameter of the outer fitting portion 44 described later of the connecting pin 16. Is formed.

長孔縁部32bを閉塞する閉塞端32cは、半円状に形成されていることが好適である。閉塞端32cの直径は、連結ピン16の後述する外側嵌合部44の直径と同じかそれよりも僅かに大きく形成され、内側嵌合部42の直径よりも小さく形成されている。   The closed end 32c that closes the long hole edge 32b is preferably formed in a semicircular shape. The diameter of the closed end 32 c is formed to be the same as or slightly larger than the diameter of an outer fitting portion 44 described later of the connecting pin 16 and smaller than the diameter of the inner fitting portion 42.

連結ピン16は、内側管12の環状縁部22に嵌合する内側嵌合部(第1嵌合部)42と、内側嵌合部42に一体的に形成され外側管14の開口縁部32に嵌合する外側嵌合部(第2嵌合部)44とを有する。外側嵌合部44は、内側嵌合部(第1嵌合部)42に対して基礎中心軸C0の軸回り方向の幅が小さい。内側嵌合部42及び外側嵌合部44は、それぞれ円盤状(外形が丸型)に形成され、同一の中心軸CP上にある。
連結ピン16の中心軸CPに沿った厚さは、内側管12のボディ20の肉厚及び外側管14のボディ30の肉厚を加算したものと同じかそれよりも僅かに薄肉に形成されている。具体的には、内側嵌合部42の厚さは、内側管12の肉厚と同じか、それよりも僅かに薄肉に形成されている。外側嵌合部44の厚さは、外側管14の肉厚と同じかそれよりも僅かに薄肉に形成されている。
The connecting pin 16 is formed integrally with the inner fitting portion (first fitting portion) 42 that fits the annular edge portion 22 of the inner tube 12, and the opening edge portion 32 of the outer tube 14 that is integrally formed with the inner fitting portion 42. And an outer fitting portion (second fitting portion) 44 that is fitted to the outer side. The outer fitting portion 44 has a smaller width in the direction around the axis of the basic central axis C0 than the inner fitting portion (first fitting portion) 42. The inner fitting portion 42 and the outer fitting portion 44 are each formed in a disk shape (outer shape is round) and are on the same central axis CP.
The thickness of the connecting pin 16 along the central axis CP is the same as or slightly thinner than the sum of the thickness of the body 20 of the inner tube 12 and the thickness of the body 30 of the outer tube 14. Yes. Specifically, the thickness of the inner fitting portion 42 is the same as the thickness of the inner tube 12 or slightly thinner than that. The thickness of the outer fitting portion 44 is formed to be equal to or slightly thinner than the thickness of the outer tube 14.

内側嵌合部42の中心軸CPに対する外径のうち、外側嵌合部44に近接する位置の外径は、連結ピン16の外径のうちで最も大きく形成されている。内側嵌合部42は、皿ネジの皿部分のような形状に形成されていることが好ましい。   Of the outer diameters of the inner fitting portion 42 with respect to the central axis CP, the outer diameter at a position close to the outer fitting portion 44 is formed to be the largest of the outer diameters of the connecting pins 16. The inner fitting part 42 is preferably formed in a shape like a countersunk part of a countersunk screw.

連結ピン16の内側嵌合部42が内側管12の環状縁部22に嵌合された状態で、内側管12の内周面よりも中心軸C0に向かって突出して近接するのを防止し、かつ、内側管12の外周面よりも中心軸C0に対して離隔するのを防止する。そして、連結ピン16の内側嵌合部42は、内側管12の環状縁部22に対して脱落するのを防止している。   In a state where the inner fitting portion 42 of the connecting pin 16 is fitted to the annular edge portion 22 of the inner tube 12, it is prevented from projecting toward the central axis C 0 and approaching the inner peripheral surface of the inner tube 12, In addition, the inner tube 12 is prevented from being separated from the central axis C0 than the outer peripheral surface. The inner fitting portion 42 of the connecting pin 16 prevents the inner pin 12 from dropping off from the annular edge 22 of the inner tube 12.

連結ピン16の外側嵌合部44の外径は、外側管14の開口縁部32の長孔縁部32bの周方向幅と同じかそれよりも僅かに小さく形成されている。このため、連結ピン16の外側嵌合部44は、外側管14の開口縁部32に保持される。   The outer diameter of the outer fitting portion 44 of the connecting pin 16 is formed to be the same as or slightly smaller than the circumferential width of the long hole edge portion 32 b of the opening edge portion 32 of the outer tube 14. For this reason, the outer fitting portion 44 of the connecting pin 16 is held by the opening edge portion 32 of the outer tube 14.

なお、連結ピン16は、後述するように、内側管12、外側管14及び連結ピン16が適宜に配設された状態で、中心軸C0に対する遠位端(外側嵌合部44の上端縁部)が外側管14のボディ30の外周面と同じ(面一)かそれよりも中心軸C0に近接する位置(引き込んだ位置)に配置される。   As will be described later, the connecting pin 16 has a distal end with respect to the central axis C0 (an upper edge portion of the outer fitting portion 44) in a state where the inner tube 12, the outer tube 14, and the connecting pin 16 are appropriately disposed. ) Is arranged at the same position as the outer peripheral surface of the body 30 of the outer tube 14 (at the same level) or at a position closer to the central axis C0 (the retracted position).

次に、この実施形態に係る管連結構造10の作用(組み立て方)について説明する。   Next, an operation (how to assemble) the pipe connection structure 10 according to this embodiment will be described.

図1に示すように、内側管12及び外側管14を中心軸C0に沿って配置する。そして、図2A及び図2Bに示すように、内側管12の外側に外側管14をほぼ同軸になるように配置する。すなわち、外側管14のボディ30は、中心軸C0に対して同心状に内側管12のボディ20の外側に配設される。このとき、内側管12のボディ20及び外側管14のボディ30は、中心軸C0に沿って相対的にスライド可能であるとともに、中心軸C0の軸回りにスライド可能である。そして、内側管12の環状縁部22と、外側管14の開口縁部32のC字状縁部32aとの位置を重ねるようにして、環状縁部22とC字状縁部32aとの中心軸を一致させる。   As shown in FIG. 1, the inner tube 12 and the outer tube 14 are disposed along the central axis C0. 2A and 2B, the outer tube 14 is disposed outside the inner tube 12 so as to be substantially coaxial. That is, the body 30 of the outer tube 14 is disposed outside the body 20 of the inner tube 12 concentrically with the central axis C0. At this time, the body 20 of the inner tube 12 and the body 30 of the outer tube 14 are relatively slidable along the central axis C0 and are slidable around the central axis C0. The center of the annular edge 22 and the C-shaped edge 32a is overlapped so that the positions of the annular edge 22 of the inner tube 12 and the C-shaped edge 32a of the opening edge 32 of the outer tube 14 are overlapped. Match the axes.

そして、図3A及び図3Bに示すように、内側管12の環状縁部22及び外側管14の開口縁部32のC字状縁部32aの中心軸を一致させた状態で、連結ピン16を内側管12の環状縁部22及び外側管14の開口縁部32のC字状縁部32aに配置する。このとき、内側管12の環状縁部22に連結ピン16の内側嵌合部42を配置し、外側管14の開口縁部32のC字状縁部32aの内側に連結ピン16の外側嵌合部44を配置する。なお、この作業は、連結ピン16が重力により脱落するのを防止するため、内側管12の環状縁部22及び外側管14の開口縁部32を上側に向けた状態で行うことが好ましい。   Then, as shown in FIGS. 3A and 3B, the connecting pin 16 is connected with the central axes of the annular edge 22 of the inner tube 12 and the C-shaped edge 32 a of the opening edge 32 of the outer tube 14 aligned. Arranged on the annular edge 22 of the inner tube 12 and the C-shaped edge 32 a of the opening edge 32 of the outer tube 14. At this time, the inner fitting portion 42 of the connecting pin 16 is disposed on the annular edge portion 22 of the inner tube 12, and the outer fitting of the connecting pin 16 is performed inside the C-shaped edge portion 32 a of the opening edge portion 32 of the outer tube 14. The part 44 is arranged. This operation is preferably performed with the annular edge 22 of the inner tube 12 and the opening edge 32 of the outer tube 14 facing upward to prevent the connecting pin 16 from falling off due to gravity.

この状態で、内側管12に対して外側管14を中心軸C0に沿って相対的に移動させる。特に、連結ピン16の外側嵌合部44をC字状縁部32aから長孔縁部32bを通して閉塞端32cに向かって相対的に移動させる。   In this state, the outer tube 14 is moved relative to the inner tube 12 along the central axis C0. In particular, the outer fitting portion 44 of the connecting pin 16 is relatively moved from the C-shaped edge portion 32a toward the closed end 32c through the long hole edge portion 32b.

ここで、連結ピン16の外側嵌合部44を長孔縁部32bの閉塞端32cに近接させると、連結ピン16の内側嵌合部42は、長孔縁部32bにより内側管12の環状縁部22に押し付けられる。すなわち、連結ピン16の外側嵌合部44を、外側管14のボディ30の内周面で連結ピン16の内側嵌合部42を内側管12の環状縁部22に嵌合させた状態を維持しながら内側管12のボディ20に対して外側管14のボディ30を中心軸C0の軸方向に相対的に移動させて開口縁部(キー溝)32のC字状縁部32aから長孔縁部(対向縁部)32bを通して閉塞端32cに向かって相対的に移動させる。このように、連結ピン16の外側嵌合部44を長孔縁部32bの閉塞端32cに近接させることで、連結ピン16が内側管12及び外側管14から脱落するのが防止される。   Here, when the outer fitting portion 44 of the connecting pin 16 is brought close to the closed end 32c of the long hole edge portion 32b, the inner fitting portion 42 of the connecting pin 16 is connected to the annular edge of the inner tube 12 by the long hole edge portion 32b. It is pressed against the part 22. That is, the outer fitting portion 44 of the connecting pin 16 is maintained in a state where the inner fitting portion 42 of the connecting pin 16 is fitted to the annular edge 22 of the inner tube 12 on the inner peripheral surface of the body 30 of the outer tube 14. While moving the body 30 of the outer tube 14 relative to the body 20 of the inner tube 12 in the axial direction of the central axis C0, the edge of the long hole from the C-shaped edge 32a of the opening edge (key groove) 32 It is relatively moved toward the closed end 32c through the portion (opposing edge) 32b. As described above, the connection pin 16 is prevented from falling off the inner tube 12 and the outer tube 14 by bringing the outer fitting portion 44 of the connection pin 16 close to the closed end 32c of the long hole edge portion 32b.

そして、図4Aから図4Dに示すように、連結ピン16の外側嵌合部44を長孔縁部32bの閉塞端32cに当接させる。   4A to 4D, the outer fitting portion 44 of the connecting pin 16 is brought into contact with the closed end 32c of the long hole edge portion 32b.

図4Dに示すように、連結ピン16の外側嵌合部44の外径は外側管14の長孔縁部32bの幅と略一致している。このため、内側管12及び外側管14が中心軸C0に対して相対的に周方向に移動するのが規制されている。また、内側管12及び外側管14を中心軸C0に沿って互いに反対方向に引っ張り力を付加したときに、内側管12及び外側管14の連結状態を維持することができる。したがって、連結ピン16の外側嵌合部44は、内側管12の開口縁部(キー溝)32の閉塞端32cに当接した状態で保持される。   As shown in FIG. 4D, the outer diameter of the outer fitting portion 44 of the connecting pin 16 substantially matches the width of the long hole edge portion 32 b of the outer tube 14. For this reason, the inner tube 12 and the outer tube 14 are restricted from moving in the circumferential direction relative to the central axis C0. Further, when a tensile force is applied to the inner tube 12 and the outer tube 14 in opposite directions along the central axis C0, the connected state of the inner tube 12 and the outer tube 14 can be maintained. Therefore, the outer fitting portion 44 of the connecting pin 16 is held in a state of being in contact with the closed end 32 c of the opening edge portion (key groove) 32 of the inner tube 12.

この状態で、外側管14の開口縁部32の内側で、連結ピン16の内側嵌合部42のうち外側に露出した部位と内側管12のボディ20の外周面との間に、例えば紫外線硬化型の接着剤等の樹脂材を塗布する。そして、その樹脂材に紫外線を照射するなどして、適宜に硬化させる。このため、内側管12及び外側管14を連結ピン16により中心軸C0に沿った軸方向及び中心軸C0の軸回りの周方向に位置決めすることができる。   In this state, on the inner side of the opening edge portion 32 of the outer tube 14, between the exposed portion of the inner fitting portion 42 of the connecting pin 16 and the outer peripheral surface of the body 20 of the inner tube 12, for example, ultraviolet curing. Apply resin material such as mold adhesive. Then, the resin material is appropriately cured by irradiating ultraviolet rays or the like. For this reason, the inner tube 12 and the outer tube 14 can be positioned by the connecting pin 16 in the axial direction along the central axis C0 and in the circumferential direction around the central axis C0.

以上説明したように、この実施形態によれば、以下のことが言える。
内側管12と外側管14とが中心軸C0に沿って互いに反対方向に引っ張られる引っ張り力が負荷されたとき、内側管12のボディ20の外周面と外側管14のボディ30の内周面との間はスライドするように形成されているので、連結ピン16の内側嵌合部42の少なくとも一部は外側管14のボディ30の内周面により、内側管12の環状縁部22に向かって密着するように押圧される。このため、連結ピン16の内側嵌合部42は内側管12の環状縁部22に嵌合された状態で保持される。また、連結ピン16の外側嵌合部44は閉塞端32cに当接されるだけである。このため、引っ張り力に対して、内側管12及び外側管14の位置関係を維持することができる。
したがって、内側管12と外側管14とが中心軸C0に沿って互いに反対方向に引っ張られたとき、連結ピン16の内側嵌合部42が内側管12の環状縁部22に嵌合された状態で保持されるとともに、連結ピン16の外側嵌合部44が外側管14の長孔縁部32bの閉塞端32cが当接された状態で保持される。
As described above, according to this embodiment, the following can be said.
When a tensile force is applied to pull the inner tube 12 and the outer tube 14 in opposite directions along the central axis C0, the outer peripheral surface of the body 20 of the inner tube 12 and the inner peripheral surface of the body 30 of the outer tube 14 The inner fitting portion 42 of the connecting pin 16 is directed toward the annular edge 22 of the inner tube 12 by the inner peripheral surface of the body 30 of the outer tube 14. It is pressed so that it adheres. For this reason, the inner fitting portion 42 of the connecting pin 16 is held in a state of being fitted to the annular edge portion 22 of the inner tube 12. Further, the outer fitting portion 44 of the connecting pin 16 is only brought into contact with the closed end 32c. For this reason, the positional relationship between the inner tube 12 and the outer tube 14 can be maintained with respect to the pulling force.
Therefore, when the inner tube 12 and the outer tube 14 are pulled in opposite directions along the central axis C0, the inner fitting portion 42 of the connecting pin 16 is fitted to the annular edge 22 of the inner tube 12. And the outer fitting portion 44 of the connecting pin 16 is held in a state where the closed end 32c of the long hole edge portion 32b of the outer tube 14 is in contact.

内側管12と外側管14とが中心軸C0の軸回りに互いに反対方向にねじられるねじり力が負荷されたとき、内側管12のボディ20の外周面と外側管14のボディ30の内周面との間はスライドするように形成されているので、連結ピン16の内側嵌合部42の少なくとも一部は外側管14のボディ30の内周面により、内側管12の環状縁部22に向かって密着するように押圧される。このため、連結ピン16の内側嵌合部42は内側管12の環状縁部22に嵌合された状態で保持される。また、連結ピン16の外側嵌合部44は長孔縁部32b又は閉塞端32cに当接されるだけである。このため、内側管12と外側管14との間のねじり力に対して、内側管12及び外側管14の位置関係を維持することができる。
したがって、内側管12と外側管14とが中心軸C0の軸回りに互いに反対方向に回動力が負荷されたとき(ねじり方向に負荷がかけられたとき)、連結ピン16の内側嵌合部42が内側管12の環状縁部22に嵌合された状態で保持されるとともに、連結ピン16の外側嵌合部44が長孔縁部32b又は閉塞端32cに当接された状態で保持される。
When a torsional force that twists the inner tube 12 and the outer tube 14 in directions opposite to each other about the central axis C0 is applied, the outer peripheral surface of the body 20 of the inner tube 12 and the inner peripheral surface of the body 30 of the outer tube 14 are loaded. Are formed so as to slide between each other, at least a part of the inner fitting portion 42 of the connecting pin 16 faces the annular edge 22 of the inner tube 12 by the inner peripheral surface of the body 30 of the outer tube 14. And pressed so as to be in close contact with each other. For this reason, the inner fitting portion 42 of the connecting pin 16 is held in a state of being fitted to the annular edge portion 22 of the inner tube 12. Further, the outer fitting portion 44 of the connecting pin 16 is only brought into contact with the long hole edge portion 32b or the closed end 32c. For this reason, the positional relationship between the inner tube 12 and the outer tube 14 can be maintained with respect to the torsional force between the inner tube 12 and the outer tube 14.
Therefore, when the inner tube 12 and the outer tube 14 are loaded with rotational force in opposite directions around the axis of the central axis C0 (when a load is applied in the torsional direction), the inner fitting portion 42 of the connecting pin 16. Is held in a state of being fitted to the annular edge portion 22 of the inner tube 12, and the outer fitting portion 44 of the connecting pin 16 is held in a state of being in contact with the long hole edge portion 32b or the closed end 32c. .

このため、この実施形態に係る管連結構造10は、引張方向及びねじり方向への負荷に対して、耐性を発揮することができる。   For this reason, the pipe connection structure 10 according to this embodiment can exhibit resistance to loads in the tensile direction and the torsional direction.

また、例えばビス又はネジなどで内側管12及び外側管14を連結する形態とは異なり、連結ピン16の外側嵌合部44の頭部が外側管14の外側に突出することが防止されている。このため、この実施形態に係る管連結構造10は、内側管12と外側管14とを連結した状態で、外側管14の外径に影響を与えることを防止することができる。すなわち、内側管12及び外側管14を連結する際に、出っ張りを防止し、2つの管12,14同士の接続の細径化に寄与する。   Further, unlike the embodiment in which the inner tube 12 and the outer tube 14 are connected with screws or screws, for example, the head of the outer fitting portion 44 of the connecting pin 16 is prevented from projecting outside the outer tube 14. . For this reason, the pipe connection structure 10 according to this embodiment can prevent the outer diameter of the outer pipe 14 from being affected while the inner pipe 12 and the outer pipe 14 are connected. That is, when the inner tube 12 and the outer tube 14 are connected, the protrusion is prevented, and the connection between the two tubes 12 and 14 is reduced.

したがって、この実施形態に係る管連結構造10によれば、内側管12及び外側管14を連結ピン16で連結することにより、互いに対する引っ張り力及びねじり力に対して高強度を維持しながら、外側の出っ張り等を極力防止して、管の接続部の細径化に寄与することができる。   Therefore, according to the pipe connecting structure 10 according to this embodiment, the inner pipe 12 and the outer pipe 14 are connected by the connecting pin 16, thereby maintaining the high strength against the tensile force and the torsional force with respect to each other. As a result, it is possible to contribute to the reduction of the diameter of the connecting portion of the pipe.

なお、管連結構造10の用途は、一例として、例えば図5Aに示す内視鏡のような導入装置1の挿入部2の可撓管3の螺旋管の先端に接続される口金を内側管12とし、導入装置1の挿入部2の湾曲部4の湾曲管5の最も基端の湾曲駒5aを外側管14に一体化しても良い。また、その逆(外側管14に可撓管3の螺旋管の先端に接続される口金を一体化し、内側管12に湾曲管5の最も基端の湾曲駒5aを一体化すること)も可能である。すなわち、導入装置1は、管連結構造10を含む、孔内に挿入される挿入部2を有する。ここでは、図5Bに示すように、最も基端の湾曲駒5a(内側管12)の先端側には複数の湾曲駒5b,5c,…,5nが連結されて湾曲管5が形成されている。   As an example, the use of the tube connection structure 10 may include a base connected to the tip of the spiral tube of the flexible tube 3 of the insertion portion 2 of the introducing device 1 such as the endoscope shown in FIG. The bending piece 5a at the most proximal end of the bending tube 5 of the bending portion 4 of the insertion portion 2 of the introducing device 1 may be integrated with the outer tube. The reverse is also possible (the base connected to the distal end of the helical tube of the flexible tube 3 is integrated with the outer tube 14 and the bending piece 5a at the most proximal end of the bending tube 5 is integrated with the inner tube 12). It is. That is, the introduction device 1 includes the insertion portion 2 that is inserted into the hole including the pipe connection structure 10. Here, as shown in FIG. 5B, the bending tube 5 is formed by connecting a plurality of bending pieces 5b, 5c,. .

この実施形態に係る導入装置1は、最も基端の湾曲管5(内側管12)と外側管14との間にかかるトルクへの耐久性を向上させることができる。すなわち、管連結構造10の用途の一例として、径が非常に細く強くねじる挿入部2を有する内視鏡等の導入装置1に用いることが好ましい。   The introduction device 1 according to this embodiment can improve the durability against torque applied between the most proximal curved tube 5 (inner tube 12) and the outer tube 14. That is, as an example of the use of the tube connection structure 10, it is preferably used for the introduction device 1 such as an endoscope having the insertion portion 2 that is very thin and strongly twisted.

なお、ここでの内側管12及び外側管14の外径は例えば5mm程度で、内側管12のボディ20及び外側管14のボディ30の各厚さは1mm以下であるような非常に細径であることも好適である。すなわち、外径が5mm程度の挿入部2に管連結構造10を適用することにより、挿入部2の外径を大きくするのを防止できるとともに、複数の管同士が互いに反対方向に引っ張られる際の引張耐性、及び、複数の管同士が中心軸の軸回りに互いに反対方向にねじられる際のねじり耐性を発揮することができる。
内視鏡の湾曲管の端部と接続管(口金)とをネジ止めすることも考えられる。内視鏡の湾曲管(例えば内側管)の端部と接続管(外側管、口金)との間を適切にネジで締結するためには、締結部分を所定のネジ山数が確保できる長さにする必要がある。しかしながら、内視鏡の湾曲管の端部と接続管(口金)との間を適切に短いネジで高い耐久性を有する細い管連結構造を実現することは難しい。この実施形態では、ネジを用いる必要がないので、ネジ頭が口金の外側に突出することがない。したがって、管同士を接続したときの外径がネジ頭により大きくなり得るのを防止することができる。
Here, the outer diameters of the inner tube 12 and the outer tube 14 are about 5 mm, for example, and the thicknesses of the body 20 of the inner tube 12 and the body 30 of the outer tube 14 are very small diameters of 1 mm or less. It is also suitable. That is, by applying the pipe connection structure 10 to the insertion part 2 having an outer diameter of about 5 mm, it is possible to prevent the outer diameter of the insertion part 2 from being increased, and when a plurality of pipes are pulled in opposite directions. Tensile resistance and torsion resistance when a plurality of tubes are twisted in opposite directions around the central axis can be exhibited.
It is also conceivable to screw the end portion of the bending tube of the endoscope and the connection tube (base). In order to properly fasten the end of the bending tube (for example, the inner tube) of the endoscope and the connection tube (the outer tube, the base) with screws, a length that can secure a predetermined number of threads on the fastening portion. It is necessary to. However, it is difficult to realize a thin tube connection structure having high durability with an appropriately short screw between the end of the bending tube of the endoscope and the connection tube (base). In this embodiment, since it is not necessary to use a screw, the screw head does not protrude outside the base. Therefore, it can prevent that the outer diameter when connecting pipes may become large with a screw head.

また、連結ピン16の内側嵌合部42及び外側嵌合部44の外形は、丸形に限ることはなく、例えば楕円形や多角形等であっても良い。この場合、内側管12の環状縁部22の形状は、連結ピン16の内側嵌合部42の形状に合わせて、例えば楕円形や多角形等に形成される。   Further, the outer shape of the inner fitting portion 42 and the outer fitting portion 44 of the connecting pin 16 is not limited to a round shape, and may be, for example, an ellipse or a polygon. In this case, the shape of the annular edge portion 22 of the inner tube 12 is formed to be, for example, an ellipse or a polygon according to the shape of the inner fitting portion 42 of the connecting pin 16.

また、図6に示すように、連結ピン16の形状は、側方から見ると、外径が異なる皿ネジの皿部分同士を軸方向に重ねたような形状であっても良い。すなわち、内側嵌合部42だけでなく、外側嵌合部44も、皿ネジの皿部分のように形成されていることが好ましい。このため、外側管14の開口縁部32の特に閉塞端32cも、外周側の開口量が内周側に比べて大きく形成されていることも好ましい。連結ピン16の外側嵌合部44の外周面、及び、外側管14の開口縁部32の閉塞端32cを斜面に形成することにより、連結ピン16の外側嵌合部44の外周面と、外側管14の開口縁部32の閉塞端32cとの接触面積を大きくして嵌合させることにより、両者の耐性を向上させることができる。また、内側嵌合部42と外側嵌合部44との境界を、外側管14の開口縁部32の閉塞端32cに引っ掛けることができる。このため、内側管12及び外側管14に対して互いに反対方向の引っ張り力や、曲げやねじりの負荷が掛けられたときに、連結ピン16が内側管12及び外側管14から脱落するのを防止することができる。   As shown in FIG. 6, the shape of the connecting pin 16 may be a shape in which countersunk parts of countersunk screws having different outer diameters are overlapped in the axial direction when viewed from the side. That is, it is preferable that not only the inner fitting portion 42 but also the outer fitting portion 44 is formed like a countersunk portion of a countersunk screw. For this reason, it is also preferable that the opening end 32c of the opening edge portion 32 of the outer tube 14 is formed to have a larger opening amount on the outer peripheral side than on the inner peripheral side. By forming the outer peripheral surface of the outer fitting portion 44 of the connecting pin 16 and the closed end 32c of the opening edge portion 32 of the outer tube 14 on the inclined surface, the outer peripheral surface of the outer fitting portion 44 of the connecting pin 16 and the outer side By increasing the contact area between the closed end 32c of the opening edge 32 of the tube 14 and fitting it, the resistance of both can be improved. Further, the boundary between the inner fitting portion 42 and the outer fitting portion 44 can be hooked on the closed end 32 c of the opening edge portion 32 of the outer tube 14. For this reason, the connection pin 16 is prevented from dropping from the inner tube 12 and the outer tube 14 when a tensile force in the opposite direction to the inner tube 12 and the outer tube 14 or a load of bending or twisting is applied. can do.

次に、第2実施形態について図7から図15を用いて説明する。この実施形態は第1実施形態の変形例であって、第1実施形態で説明した部材と同一の部材又は同一の機能を有する部材には極力同一の符号を付し、詳しい説明を省略する。   Next, a second embodiment will be described with reference to FIGS. This embodiment is a modification of the first embodiment, and the same members as those described in the first embodiment or members having the same functions are denoted by the same reference numerals as much as possible, and detailed description thereof is omitted.

図7から図14Cに示す管連結構造10は、内側管12と、外側管14と、内側管12及び外側管14を連結させる第1及び第2連結ピン16,18とを有する。第1及び第2連結ピン16,18は、異なる形状のものを用いても良いが、同じもの(同形状のもの)が用いられることが好適である。すなわち、第1連結ピン(連結体)16の内側嵌合部42の直径に対して、第2連結ピン(他の連結体)18の内側嵌合部42の直径が異なっていても良い。また、第1連結ピン16の外側嵌合部44の直径に対して、第2連結ピン18の外側嵌合部44の直径が異なっていても良い。   7 to 14C includes an inner tube 12, an outer tube 14, and first and second connecting pins 16 and 18 that connect the inner tube 12 and the outer tube 14. The first and second connecting pins 16 and 18 may have different shapes, but the same one (the same shape) is preferably used. That is, the diameter of the inner fitting portion 42 of the second connecting pin (other connecting body) 18 may be different from the diameter of the inner fitting portion 42 of the first connecting pin (connecting body) 16. Further, the diameter of the outer fitting portion 44 of the second connecting pin 18 may be different from the diameter of the outer fitting portion 44 of the first connecting pin 16.

図7及び図8(A)に示すように、この実施形態では、内側管12は、そのボディ20に形成された第1環状縁部(第1縁部)22及び第2環状縁部(他の第1縁部)24を有する。第1及び第2環状縁部22,24は、ボディ20の一端20aと他端20bとの間の適宜の位置に形成することができる。図8(A)中、第1及び第2環状縁部22,24は中心軸C0に対して対向するように描かれているが、必ずしも第1及び第2環状縁部22,24が中心軸C0に対して対向している必要はない。第1及び第2環状縁部22,24は中心軸C0に対して例えば互いに90度離れた位置に形成されていても良い。すなわち、第1及び第2環状縁部22,24は、中心軸C0に対して周方向にずらした位置に形成されている。このとき、第1及び第2環状縁部22,24は、中心軸C0に対して誤差なく厳密に周方向に90度離れた位置に形成されている必要はなく、略90度の間隔であればよく、部品の公差や加工上の誤差、または避けられない設計上の事情により、多少の角度のずれは許容される。
また、第1及び第2環状縁部22,24は、中心軸C0の軸方向位置が一致していることが好適であるが、外側管14の後述する第1及び第2開口縁部32,34との関係で、中心軸C0に対して軸方向に位置ずれしていることも好適である。この実施形態では、説明の簡単のため、第1及び第2環状縁部22,24が中心軸C0に対して対向しているものとして説明する。
As shown in FIGS. 7 and 8A, in this embodiment, the inner tube 12 includes a first annular edge (first edge) 22 and a second annular edge (others) formed on the body 20 thereof. First edge) 24. The first and second annular edges 22 and 24 can be formed at appropriate positions between the one end 20a and the other end 20b of the body 20. In FIG. 8A, the first and second annular edges 22 and 24 are drawn so as to face the center axis C0, but the first and second annular edges 22 and 24 are not necessarily center axes. There is no need to face C0. The first and second annular edges 22 and 24 may be formed, for example, at positions 90 degrees apart from the central axis C0. That is, the first and second annular edges 22 and 24 are formed at positions shifted in the circumferential direction with respect to the central axis C0. At this time, the first and second annular edges 22 and 24 do not need to be formed at positions that are exactly 90 degrees apart from the central axis C0 in the circumferential direction without any error. It is sufficient that some angle deviation is allowed due to part tolerance, processing error, or unavoidable design circumstances.
The first and second annular edges 22 and 24 preferably have the same axial position of the central axis C0, but the first and second opening edges 32 and 32 described later of the outer tube 14 will be described later. It is also preferable that the position is shifted in the axial direction with respect to the central axis C0. In this embodiment, for the sake of simplicity of explanation, the first and second annular edge portions 22 and 24 are described as facing the central axis C0.

環状縁部22,24は、中心軸C0に近接する内周側の直径が、中心軸C0に離隔する外周側の直径に比べて小さく形成されている。そして、環状縁部22,24は、外周側から内周側に向かってテーパ状に形成されている。ここでは、環状縁部22は、内側縁部22aと外側縁部22bとを有する。環状縁部24は、内側縁部24aと外側縁部24bとを有する。   The annular edge portions 22 and 24 are formed such that the diameter on the inner peripheral side close to the central axis C0 is smaller than the diameter on the outer peripheral side separated from the central axis C0. And the annular edge parts 22 and 24 are formed in the taper shape toward the inner peripheral side from the outer peripheral side. Here, the annular edge 22 has an inner edge 22a and an outer edge 22b. The annular edge 24 has an inner edge 24a and an outer edge 24b.

図7及び図8(B)に示すように、外側管14は、第1及び第2開口縁部(キー溝)32,34を有する。第1及び第2開口縁部32,34は、ボディ30の一端30aと他端30bとの間の適宜の位置に形成することができる。   As shown in FIGS. 7 and 8B, the outer tube 14 has first and second opening edges (key grooves) 32 and 34. The first and second opening edges 32 and 34 can be formed at appropriate positions between the one end 30a and the other end 30b of the body 30.

第1開口縁部(キー溝)32は、C字状縁部32aと、長孔縁部(対向縁部)32bとを一体的に有する。ここでは、C字状縁部32aがボディ30の他端30bに近接し、長孔縁部32bがボディ30の一端30aに近接している。第1開口縁部32の長孔縁部32bのうち、C字状縁部32aに対する遠位端は、閉塞端32cである。   The first opening edge portion (key groove) 32 integrally includes a C-shaped edge portion 32a and a long hole edge portion (opposing edge portion) 32b. Here, the C-shaped edge 32 a is close to the other end 30 b of the body 30, and the long hole edge 32 b is close to the one end 30 a of the body 30. Of the elongated hole edge 32b of the first opening edge 32, the distal end with respect to the C-shaped edge 32a is a closed end 32c.

第2開口縁部(キー溝、他の開口縁部)34は、C字状縁部(他の第1縁部)34aと、長孔縁部(対向縁部、他の第2縁部)34bとを一体的に有する。C字状縁部34aは、中心軸C0に直交する方向に貫通し、第2環状縁部24に一致させることが可能である。長孔縁部34bは、互いに対向する縁部を有し、C字状縁部34aに一体的に中心軸C0に沿って、第1開口縁部32の長孔縁部32bに対して反対側に形成され、C字状縁部34aに対して中心軸C0の軸回り方向の幅が小さい。閉塞端34cは、長孔縁部34bに一体的に形成され、C字状縁部34aに対して遠位にある。   The second opening edge (key groove, other opening edge) 34 includes a C-shaped edge (other first edge) 34a and a long hole edge (opposing edge, other second edge). 34b integrally. The C-shaped edge 34 a can penetrate in a direction orthogonal to the central axis C <b> 0 and can coincide with the second annular edge 24. The long hole edge 34b has edges opposite to each other, and is integrally formed with the C-shaped edge 34a along the central axis C0 and opposite to the long hole edge 32b of the first opening edge 32. The width of the central axis C0 around the axis is small with respect to the C-shaped edge 34a. The closed end 34c is integrally formed with the slot edge 34b and is distal to the C-shaped edge 34a.

ここでは、C字状縁部34aがボディ30の一端30aに近接し、長孔縁部34bがボディ30の他端30bに近接している。長孔縁部34bのうち、C字状縁部34aに対する遠位端は、閉塞端34cである。
このため、第1及び第2開口縁部32,34は、C字状縁部32a,34a及び長孔縁部32b,34bの構造が、中心軸C0に沿って、互いに反対である。
Here, the C-shaped edge 34 a is close to one end 30 a of the body 30, and the long hole edge 34 b is close to the other end 30 b of the body 30. A distal end of the long hole edge 34b with respect to the C-shaped edge 34a is a closed end 34c.
For this reason, the first and second opening edges 32 and 34 have the C-shaped edges 32a and 34a and the long hole edges 32b and 34b that are opposite to each other along the central axis C0.

第1開口縁部32のうち、長孔縁部32bは、第2開口縁部34の長孔縁部34bに対して長手軸Lに沿って長く形成されている。言い換えると、第2開口縁部34のうち、長孔縁部34bは、第1開口縁部32の長孔縁部32bに対して長手軸Lに沿って短く形成されている。なお、図8(B)に示すように、C字状縁部32a,34aは、中心軸C0に沿ってずれた位置にあり、中心軸C0に対して対向していない。   Of the first opening edge 32, the long hole edge 32 b is formed longer along the longitudinal axis L than the long hole edge 34 b of the second opening edge 34. In other words, the long hole edge 34 b of the second opening edge 34 is formed to be shorter along the longitudinal axis L than the long hole edge 32 b of the first opening edge 32. As shown in FIG. 8B, the C-shaped edge portions 32a and 34a are at positions shifted along the central axis C0 and do not face the central axis C0.

次に、この実施形態に係る管連結構造10の作用(組み立て方)について説明する。   Next, an operation (how to assemble) the pipe connection structure 10 according to this embodiment will be described.

図7に示すように、内側管12及び外側管14を中心軸C0に沿って配置する。そして、図9Aから図9Cに示すように、内側管12の外側に外側管14を配置する。そして、図9A及び図9Cに示すように、内側管12の第1環状縁部22と、外側管14の第1開口縁部32のC字状縁部32aとの中心軸を一致させる。このとき、図9B及び図10Bに示すように、内側管12の第2環状縁部24の殆どは、外側管14の第2開口縁部34の長孔縁部34b近傍の位置で、外側管14のボディ30により隠された位置にある。   As shown in FIG. 7, the inner tube 12 and the outer tube 14 are arranged along the central axis C0. Then, as shown in FIGS. 9A to 9C, the outer tube 14 is disposed outside the inner tube 12. 9A and 9C, the central axes of the first annular edge 22 of the inner tube 12 and the C-shaped edge 32a of the first opening edge 32 of the outer tube 14 are matched. At this time, as shown in FIG. 9B and FIG. 10B, most of the second annular edge 24 of the inner tube 12 is located in the vicinity of the long hole edge 34 b of the second opening edge 34 of the outer tube 14. It is in a position hidden by the 14 bodies 30.

図10A及び図10Cに示すように、内側管12の第1環状縁部22及び外側管14の第1開口縁部32のC字状縁部32aの中心軸を一致させた状態で、第1連結ピン16を内側管12の第1環状縁部22及び外側管14の第1開口縁部32のC字状縁部32aに配置する。このとき、内側管12の環状縁部22に連結ピン16の内側嵌合部42を配置し、外側管14の開口縁部32のC字状縁部32aの内側に連結ピン16の外側嵌合部44を配置する。なお、この作業は、第1連結ピン16が重力により脱落するのを防止するため、内側管12の第1環状縁部22及び外側管14の第1開口縁部32を上側に向けた状態で行うことが好ましい。   As shown in FIGS. 10A and 10C, the first annular edge 22 of the inner tube 12 and the central axis of the C-shaped edge 32 a of the first opening edge 32 of the outer tube 14 are aligned with each other. The connecting pin 16 is disposed on the first annular edge 22 of the inner tube 12 and the C-shaped edge 32 a of the first opening edge 32 of the outer tube 14. At this time, the inner fitting portion 42 of the connecting pin 16 is disposed on the annular edge portion 22 of the inner tube 12, and the outer fitting of the connecting pin 16 is performed inside the C-shaped edge portion 32 a of the opening edge portion 32 of the outer tube 14. The part 44 is arranged. This operation is performed with the first annular edge 22 of the inner tube 12 and the first opening edge 32 of the outer tube 14 facing upward to prevent the first connecting pin 16 from falling off due to gravity. Preferably it is done.

この状態で、図11Aから図11Cに示すように、内側管12に対して外側管14を中心軸C0に沿って相対的に移動させる。特に、連結ピン16の外側嵌合部44を第1開口縁部32の長孔縁部32bの閉塞端32cに向かって相対的に移動させる。そして、図11A及び図11Cに示すように、連結ピン16の外側嵌合部44を第1開口縁部32の長孔縁部32bの閉塞端32cに当接させる。このため、連結ピン16は外側管14により内側管12に押さえられているので、内側管12及び外側管14を中心軸C0の軸回りに回動又は回動させても、重力により連結ピン16が脱落するのが防止されている。そして、このとき、図11B及び図11Cに示すように、内側管12の第2環状縁部24と、外側管14の第2開口縁部34のC字状縁部34aとの中心軸が一致する。   In this state, as shown in FIGS. 11A to 11C, the outer tube 14 is moved relative to the inner tube 12 along the central axis C0. In particular, the outer fitting portion 44 of the connecting pin 16 is relatively moved toward the closed end 32 c of the long hole edge portion 32 b of the first opening edge portion 32. Then, as shown in FIGS. 11A and 11C, the outer fitting portion 44 of the connecting pin 16 is brought into contact with the closed end 32 c of the long hole edge portion 32 b of the first opening edge portion 32. For this reason, since the connecting pin 16 is held by the inner tube 12 by the outer tube 14, even if the inner tube 12 and the outer tube 14 are rotated or rotated around the central axis C0, the connecting pin 16 is caused by gravity. Is prevented from falling off. At this time, as shown in FIGS. 11B and 11C, the central axes of the second annular edge 24 of the inner tube 12 and the C-shaped edge 34a of the second opening edge 34 of the outer tube 14 coincide with each other. To do.

内側管12の第2環状縁部24及び外側管14の第2開口縁部34を上側に向ける。図11Aから図12Cに示すように、内側管12の第2環状縁部24と、外側管14の第2開口縁部34のC字状縁部34aとの中心軸が一致した状態で、第2連結ピン18を内側管12の環状縁部24及び外側管14の開口縁部34のC字状縁部34aに配置する。このとき、内側管12の環状縁部24に連結ピン18の内側嵌合部42を配置し、外側管14の第2開口縁部34のC字状縁部34aの内側に連結ピン18の外側嵌合部44を配置する。   The second annular edge 24 of the inner tube 12 and the second opening edge 34 of the outer tube 14 face upward. As shown in FIGS. 11A to 12C, the second annular edge 24 of the inner tube 12 and the C-shaped edge 34a of the second opening edge 34 of the outer tube 14 coincide with each other in the center axis. Two connecting pins 18 are arranged on the annular edge 24 of the inner tube 12 and the C-shaped edge 34 a of the opening edge 34 of the outer tube 14. At this time, the inner fitting portion 42 of the connecting pin 18 is arranged on the annular edge 24 of the inner tube 12, and the outer side of the connecting pin 18 is placed inside the C-shaped edge 34 a of the second opening edge 34 of the outer tube 14. The fitting part 44 is arranged.

図13Aから図13Cに示すように、この状態で、内側管12に対して外側管14を中心軸C0に沿って相対的に移動させる。特に、第2連結ピン18の外側嵌合部44を第2開口縁部34の長孔縁部34bの閉塞端34cに向かって相対的に移動させる。   As shown in FIGS. 13A to 13C, in this state, the outer tube 14 is moved relative to the inner tube 12 along the central axis C0. In particular, the outer fitting portion 44 of the second connecting pin 18 is relatively moved toward the closed end 34 c of the long hole edge 34 b of the second opening edge 34.

ここで、第2連結ピン18の外側嵌合部44を第2開口縁部34の長孔縁部34bの閉塞端34cに近接させると、第2連結ピン18の内側嵌合部42は、第2開口縁部34の長孔縁部34bにより内側管12の環状縁部24に押し付けられる。このため、連結ピン18は外側管14により内側管12に押さえられているので、内側管12及び外側管14を中心軸C0の軸回りに回動又は回動させても、重力により連結ピン18が脱落するのが防止されている。したがって、第2連結ピン18の外側嵌合部44を第2開口縁部34の長孔縁部34bの閉塞端34cに近接させることで、第2連結ピン18が内側管12及び外側管14から脱落するのが防止される。   Here, when the outer fitting portion 44 of the second connecting pin 18 is brought close to the closed end 34c of the long hole edge portion 34b of the second opening edge portion 34, the inner fitting portion 42 of the second connecting pin 18 is It is pressed against the annular edge 24 of the inner tube 12 by the long hole edge 34 b of the two opening edge 34. For this reason, since the connecting pin 18 is held by the inner tube 12 by the outer tube 14, even if the inner tube 12 and the outer tube 14 are rotated or rotated around the central axis C0, the connecting pin 18 is caused by gravity. Is prevented from falling off. Therefore, by bringing the outer fitting portion 44 of the second connecting pin 18 close to the closed end 34 c of the long hole edge 34 b of the second opening edge 34, the second connecting pin 18 is separated from the inner tube 12 and the outer tube 14. It is prevented from falling off.

特に、図13B、図13C及び図14Bに示すように、第2連結ピン18の外側嵌合部44を第2開口縁部34の長孔縁部34bの閉塞端34cに当接させる。このとき、図13A、図13C及び図14Aに示すように、第1連結ピン16の外側嵌合部44は、第1開口縁部32の閉塞端32cから離され、長孔縁部32bの領域内で、閉塞端32cとC字状縁部32aとの間に配置される。   In particular, as shown in FIGS. 13B, 13C, and 14B, the outer fitting portion 44 of the second connecting pin 18 is brought into contact with the closed end 34c of the long hole edge portion 34b of the second opening edge portion 34. At this time, as shown in FIGS. 13A, 13C, and 14A, the outer fitting portion 44 of the first connecting pin 16 is separated from the closed end 32c of the first opening edge portion 32, and the region of the long hole edge portion 32b. In between, it is arrange | positioned between the obstruction | occlusion end 32c and the C-shaped edge part 32a.

図13Aに示すように、第1連結ピン16の外側嵌合部44の外径は第1開口縁部32の長孔縁部32bの幅と略一致している。また、図13Bに示すように、第2連結ピン18の外側嵌合部44の外径は第2開口縁部34の長孔縁部34bの幅と略一致している。このため、内側管12及び外側管14が中心軸C0に対して相対的に周方向に移動するのが規制されている。   As shown in FIG. 13A, the outer diameter of the outer fitting portion 44 of the first connecting pin 16 substantially matches the width of the long hole edge portion 32 b of the first opening edge portion 32. Further, as shown in FIG. 13B, the outer diameter of the outer fitting portion 44 of the second connecting pin 18 substantially matches the width of the long hole edge portion 34 b of the second opening edge portion 34. For this reason, the inner tube 12 and the outer tube 14 are restricted from moving in the circumferential direction relative to the central axis C0.

図14Cには、このときの内側管12の第1及び第2環状縁部22,24、外側管14の第1及び第2開口縁部32,34、並びに、第1及び第2連結ピン16,18の関係を模式的に示す。図14Cに示すように、外側管14の第2開口縁部34の閉塞端34cに第2連結ピン18の外側嵌合部44が当接された状態で、外側管14の第1開口縁部32の長孔縁部32bに第1連結ピン16の外側嵌合部44が配置されている。   14C shows the first and second annular edges 22 and 24 of the inner tube 12, the first and second opening edges 32 and 34 of the outer tube 14, and the first and second connecting pins 16 at this time. , 18 is schematically shown. As shown in FIG. 14C, the first opening edge of the outer tube 14 with the outer fitting portion 44 of the second connecting pin 18 in contact with the closed end 34 c of the second opening edge 34 of the outer tube 14. The outer fitting portion 44 of the first connecting pin 16 is disposed in the 32 long hole edge portion 32b.

内側管12及び外側管14に対して、中心軸C0に沿って互いに反対方向に引っ張り力を負荷する。このとき、第2連結ピン18の外側嵌合部44が外側管14の第2開口縁部34の閉塞端34cに当接している。このため、内側管12及び外側管14が中心軸C0に沿って相対的に互いに反対方向に移動するのが規制されている。したがって、内側管12及び外側管14の連結状態を維持することができる。   A tensile force is applied to the inner tube 12 and the outer tube 14 in opposite directions along the central axis C0. At this time, the outer fitting portion 44 of the second connecting pin 18 is in contact with the closed end 34 c of the second opening edge 34 of the outer tube 14. For this reason, the inner tube 12 and the outer tube 14 are restricted from moving relative to each other along the central axis C0. Therefore, the connection state of the inner tube 12 and the outer tube 14 can be maintained.

また、内側管12及び外側管14に対して、中心軸C0の軸回りに、互いに反対方向にねじり力を負荷する。このとき、第1連結ピン16の外側嵌合部44が外側管14の第1開口縁部32の長孔縁部32bに当接し、第2連結ピン18の外側嵌合部44が外側管14の第2開口縁部34の閉塞端34cに当接している。このため、内側管12及び外側管14が中心軸C0の軸回りに相対的に反対方向にねじられるのが規制されている。したがって、内側管12及び外側管14の連結状態を維持することができる。   Further, a torsional force is applied to the inner tube 12 and the outer tube 14 in directions opposite to each other around the central axis C0. At this time, the outer fitting portion 44 of the first connecting pin 16 abuts on the long hole edge portion 32b of the first opening edge portion 32 of the outer tube 14, and the outer fitting portion 44 of the second connecting pin 18 is in contact with the outer tube 14. Is in contact with the closed end 34 c of the second opening edge 34. For this reason, the inner tube 12 and the outer tube 14 are restricted from being twisted in the opposite directions around the central axis C0. Therefore, the connection state of the inner tube 12 and the outer tube 14 can be maintained.

この状態で、外側管14の第1開口縁部32の内側で、第1連結ピン16の内側嵌合部42のうち外側に露出した部位と内側管12のボディ20の外周面との間に、例えば紫外線硬化型の接着剤等の樹脂材を塗布する。同様に、外側管14の第2開口縁部34の内側で、第2連結ピン18の内側嵌合部42のうち外側に露出した部位と内側管12のボディ20の外周面との間に、例えば紫外線硬化型の接着剤等の樹脂材を塗布する。そして、その樹脂材に紫外線を照射するなどして、適宜に硬化させる。このため、内側管12及び外側管14を連結ピン16,18により中心軸C0に沿った軸方向及び中心軸C0の軸回りの周方向に位置決めすることができる。
特に、樹脂材は、外側管14の第1開口縁部32の内側、第2開口縁部34の内側に充填されていることが好適である。すなわち、第1開口縁部32であれば、第1連結ピン16の外側嵌合部44の中心軸C0に沿った先端(一端30a)側及び基端(他端30b)側の両方に樹脂材が充填されていることが好適である。このため、第1及び第2連結ピン16,18が外側管14に対して中心軸C0に沿った方向に動かされるのを防止することができる。
In this state, on the inner side of the first opening edge 32 of the outer tube 14, between the portion of the inner fitting portion 42 of the first connecting pin 16 exposed to the outside and the outer peripheral surface of the body 20 of the inner tube 12. For example, a resin material such as an ultraviolet curable adhesive is applied. Similarly, on the inner side of the second opening edge 34 of the outer tube 14, between the portion of the inner fitting portion 42 of the second connecting pin 18 exposed to the outside and the outer peripheral surface of the body 20 of the inner tube 12, For example, a resin material such as an ultraviolet curable adhesive is applied. Then, the resin material is appropriately cured by irradiating ultraviolet rays or the like. Therefore, the inner tube 12 and the outer tube 14 can be positioned by the connecting pins 16 and 18 in the axial direction along the central axis C0 and in the circumferential direction around the central axis C0.
In particular, the resin material is preferably filled in the first opening edge 32 and the second opening edge 34 of the outer tube 14. That is, if it is the 1st opening edge part 32, it is resin material to both the front-end | tip (one end 30a) side and the base end (other end 30b) side along the central axis C0 of the outer fitting part 44 of the 1st connection pin 16. Is preferably filled. For this reason, it can prevent that the 1st and 2nd connection pins 16 and 18 are moved to the direction along the central axis C0 with respect to the outer side tube 14. FIG.

以上説明したように、この実施形態によれば、以下のことが言える。
この実施形態に係る管連結構造10によれば、第1連結ピン16を内側管12及び外側管14に嵌合して脱落を防止した後、第2連結ピン18を内側管12及び外側管14に嵌合する。そして、第2連結ピン18の脱落を防止するように内側管12及び外側管14を相対的に動かしたとき、第1連結ピン16の脱落も防止されている。このため、2つの連結ピン16,18を用いる場合であっても、連結ピン16,18の脱落を防止した状態で、内側管12及び外側管14を連結することができる。
As described above, according to this embodiment, the following can be said.
According to the tube connection structure 10 according to this embodiment, the first connection pin 16 is fitted to the inner tube 12 and the outer tube 14 to prevent the drop, and then the second connection pin 18 is connected to the inner tube 12 and the outer tube 14. To fit. When the inner tube 12 and the outer tube 14 are moved relatively so as to prevent the second connecting pin 18 from falling off, the first connecting pin 16 is also prevented from dropping off. For this reason, even when the two connecting pins 16 and 18 are used, the inner tube 12 and the outer tube 14 can be connected in a state in which the connecting pins 16 and 18 are prevented from falling off.

外側管14の第1開口縁部32の長孔縁部32b及び第2開口縁部34の長孔縁部34bの長さは、第2連結ピン18の外側嵌合部44が第2開口縁部34の閉塞端34cに当接された状態で、第1連結ピン16の外側嵌合部44が第1開口縁部32の長孔縁部32bに配置されるように調整されている。すなわち、第1連結ピン16の外側嵌合部44がC字状縁部32aと閉塞端32cとの間に配置されるように調整されている。このため、特に、内側管12と外側管14とが中心軸C0の軸周りに反対方向にねじられるときに、2つの部位で耐性を発揮する。このため、この実施形態に係る管連結構造10は、第1実施形態で説明した管連結構造10よりも、ねじり力に対する耐性を高くすることができる。   The length of the long hole edge portion 32b of the first opening edge portion 32 of the outer tube 14 and the length of the long hole edge portion 34b of the second opening edge portion 34 is such that the outer fitting portion 44 of the second connecting pin 18 is the second opening edge. The outer fitting portion 44 of the first connecting pin 16 is adjusted so as to be disposed at the long hole edge portion 32 b of the first opening edge portion 32 in a state where it is in contact with the closed end 34 c of the portion 34. That is, the outer fitting portion 44 of the first connecting pin 16 is adjusted so as to be disposed between the C-shaped edge portion 32a and the closed end 32c. For this reason, particularly when the inner tube 12 and the outer tube 14 are twisted in opposite directions around the axis of the central axis C0, resistance is exhibited at two parts. For this reason, the pipe connection structure 10 according to this embodiment can have higher resistance to torsional force than the pipe connection structure 10 described in the first embodiment.

図15A及び図15Bに示すように、このように接続された内側管12を、例えば内視鏡のような導入装置1の挿入部2の湾曲部4に用いられる最も基端側の湾曲駒と一体的に形成することができる。最も基端側の湾曲駒5aの先端側には、適宜に複数の湾曲駒5b,5c,…,5nを連結することができる。外側管14を、例えば内視鏡の挿入部の湾曲部と可撓管とを接続する口金として用いることができる。内視鏡では、これら内側管12及び外側管14の外側に外皮を被覆して用いる。連結ピン16,18は外側管14の外側に突出していない。このため、内視鏡の挿入部の湾曲部と可撓管との間の接続に管連結構造10を用いる場合に、中心軸C0の軸方向に沿った引っ張りに対する耐性や、中心軸C0の軸回りのねじりに対する耐性を発揮しつつ、挿入部を細径に形成することができる。   As shown in FIG. 15A and FIG. 15B, the inner tube 12 connected in this way is connected to the most proximal bending piece used for the bending portion 4 of the insertion portion 2 of the introducing device 1 such as an endoscope, for example. It can be formed integrally. A plurality of bending pieces 5b, 5c,..., 5n can be appropriately connected to the distal end side of the most proximal bending piece 5a. The outer tube 14 can be used as a base for connecting, for example, a bending portion of an insertion portion of an endoscope and a flexible tube. In the endoscope, the inner tube 12 and the outer tube 14 are covered with an outer skin and used. The connecting pins 16 and 18 do not protrude outside the outer tube 14. For this reason, when the tube connection structure 10 is used for the connection between the bending portion of the insertion portion of the endoscope and the flexible tube, resistance against pulling along the axial direction of the central axis C0 and the axis of the central axis C0. The insertion portion can be formed with a small diameter while exhibiting resistance to surrounding twisting.

また、図示しないが、内側管12を、例えば内視鏡の挿入部の湾曲部に用いられる最も先端側の湾曲駒と一体的に形成することができる。最も先端側の湾曲駒の基端側には、適宜に複数の湾曲駒を連結することができる。外側管14を、例えば内視鏡の挿入部の湾曲部と先端硬質部とを接続する口金として、又は、外側管14自体を先端硬質部として用いることができる。   Although not shown, the inner tube 12 can be formed integrally with the most distal bending piece used for the bending portion of the insertion portion of the endoscope, for example. A plurality of bending pieces can be appropriately connected to the proximal end side of the most distal bending piece. The outer tube 14 can be used, for example, as a base for connecting the curved portion of the insertion portion of the endoscope and the hard tip portion, or the outer tube 14 itself can be used as the hard tip portion.

次に、第3実施形態について図16から図21を用いて説明する。この実施形態は第1及び第2実施形態の変形例であって、第1又は第2実施形態で説明した部材と同一の部材又は同一の機能を有する部材には極力同一の符号を付し、詳しい説明を省略する。   Next, a third embodiment will be described with reference to FIGS. This embodiment is a modification of the first and second embodiments, and the same members or members having the same functions as those described in the first or second embodiment are given the same reference numerals as much as possible, Detailed description is omitted.

図16から図20Cに示す管連結構造10は、内側管12と、外側管14,114と、内側管12及び外側管14,114を連結させる第1及び第2連結ピン16,18,116,118とを有する。   16 to 20C includes an inner tube 12, an outer tube 14, 114, and first and second connecting pins 16, 18, 116, which connect the inner tube 12 and the outer tubes 14, 114. 118.

図16に示すように、内側管12のボディ20には、中心軸C0に対して周方向に例えば90度の間隔で、第1から第4環状縁部22,24,122,124が形成されている。第1から第4環状縁部22,24,122,124は、中心軸C0に対して誤差なく厳密に周方向に90度の間隔で離れていなくとも、所謂上下左右方向に形成された略90度の間隔であればよく、部品の公差や加工上の誤差、または避けられない設計上の事情により、多少の角度のずれは許容される。   As shown in FIG. 16, the body 20 of the inner tube 12 is formed with first to fourth annular edges 22, 24, 122, 124 at intervals of, for example, 90 degrees in the circumferential direction with respect to the central axis C0. ing. The first to fourth annular edges 22, 24, 122, and 124 are substantially 90 formed in the so-called vertical and horizontal directions even if they are not separated from each other by 90 degrees in the circumferential direction without error with respect to the central axis C0. The interval may be a degree, and a slight angle deviation is allowed due to part tolerances, processing errors, or unavoidable design circumstances.

この実施形態では、2つの外側管14,114が用いられる。第1外側管14のボディ30は、中心軸C0に対して対向するように延出された1対のアーム31a,31bを有する。言い換えると、ボディ30の一端30aから他端30bに向かう一部に切り欠き31c,31dが形成されて、1対のアーム31a,31bが形成されている。   In this embodiment, two outer tubes 14, 114 are used. The body 30 of the first outer tube 14 has a pair of arms 31a and 31b extending so as to face the central axis C0. In other words, the notches 31c and 31d are formed in a part from the one end 30a to the other end 30b of the body 30 to form a pair of arms 31a and 31b.

第2外側管114のボディ(他の第2管状体)130は、中心軸C0に対して対向するように延出された1対のアーム(他の1対のアーム)131a,131bを有する。言い換えると、ボディ130の他端130bから一端130aに向かう一部に切り欠き131c,131dが形成されて、1対のアーム131a,131bが形成されている。   The body (another second tubular body) 130 of the second outer tube 114 has a pair of arms (another pair of arms) 131a and 131b extending so as to face the central axis C0. In other words, notches 131c and 131d are formed in a part from the other end 130b of the body 130 toward the one end 130a to form a pair of arms 131a and 131b.

各アーム31a,31b,131a,131bは、中心軸C0に対して中心角が略90度の幅で形成されていることが好ましい。このとき、各アーム31a,31b,131a,131bは、部品の公差や加工上の誤差、または避けられない設計上の事情により、多少の角度のずれは許容される。   Each of the arms 31a, 31b, 131a, and 131b is preferably formed with a width having a central angle of about 90 degrees with respect to the central axis C0. At this time, the arms 31a, 31b, 131a, and 131b are allowed to have a slight angle shift due to component tolerances, processing errors, or unavoidable design circumstances.

第1外側管14の第1アーム31aには第2実施形態で説明した第1開口縁部32が形成され、第2アーム31bには第2実施形態で説明した第2開口縁部34が形成されている。すなわち、第1外側管14のボディ30は、その一端30aに近接する側に第1及び第2開口縁部(キー溝)32,34が形成されている。同様に、第2外側管114の第1アーム131aには第1開口縁部32と同様の第3開口縁部(キー溝、他の開口縁部)132が形成され、第2アーム131bには第2開口縁部(第3開口縁部)34と同様の第4開口縁部(キー溝、第3開口縁部)134が形成されている。すなわち、第2外側管114のボディ130は、その他端130bに近接する側に第3及び第4開口縁部(キー溝)132,134が形成されている。   The first opening edge 32 described in the second embodiment is formed on the first arm 31a of the first outer tube 14, and the second opening edge 34 described in the second embodiment is formed on the second arm 31b. Has been. That is, the body 30 of the first outer tube 14 has first and second opening edges (key grooves) 32 and 34 formed on the side close to the one end 30a. Similarly, a third opening edge (key groove, other opening edge) 132 similar to the first opening edge 32 is formed on the first arm 131a of the second outer tube 114, and the second arm 131b is formed on the second arm 131b. A fourth opening edge (key groove, third opening edge) 134 similar to the second opening edge (third opening edge) 34 is formed. That is, the body 130 of the second outer tube 114 has third and fourth opening edges (key grooves) 132 and 134 formed on the side close to the other end 130b.

第3開口縁部132は、C字状縁部132a、長孔縁部132b及び閉塞端132cを有する。第4開口縁部134は、C字状縁部134a、長孔縁部134b及び閉塞端134cを有する。   The third opening edge 132 has a C-shaped edge 132a, a long hole edge 132b, and a closed end 132c. The fourth opening edge portion 134 has a C-shaped edge portion 134a, a long hole edge portion 134b, and a closed end 134c.

なお、第3及び第4連結ピン116,118は、第1及び第2連結ピン16,18と同様のものが用いられることが好ましい。   The third and fourth connecting pins 116 and 118 are preferably the same as the first and second connecting pins 16 and 18.

次に、この実施形態に係る管連結構造10の作用(組み立て方)について説明する。   Next, an operation (how to assemble) the pipe connection structure 10 according to this embodiment will be described.

第2実施形態で説明したように、図17Aから図17Cに示すように、内側管12に対して、第1外側管14を第1及び第2連結ピン16,18を用いて連結する。このとき、第1及び第2連結ピン16,18は内側管12及び第1外側管14からの脱落が防止されている。   As described in the second embodiment, as shown in FIGS. 17A to 17C, the first outer tube 14 is connected to the inner tube 12 using the first and second connecting pins 16 and 18. At this time, the first and second connecting pins 16 and 18 are prevented from falling off from the inner tube 12 and the first outer tube 14.

第1外側管14の切り欠き31cに対して第2外側管114のアーム131aを配置し、第1外側管14の切り欠き31dに対して第2外側管114のアーム131bを配置する。このとき、第1及び第2外側管14,114は、周方向に隣接するアーム31a,131a間、アーム31a,131b間、アーム31b,131a間、及び、アーム31b,131b間がそれぞれ当接される程度に近接している。このため、第1及び第2外側管14,114は、中心軸C0の軸回りの回動が規制されている。   The arm 131a of the second outer tube 114 is disposed with respect to the notch 31c of the first outer tube 14, and the arm 131b of the second outer tube 114 is disposed with respect to the notch 31d of the first outer tube 14. At this time, the first and second outer tubes 14 and 114 are in contact with each other between the arms 31a and 131a adjacent in the circumferential direction, between the arms 31a and 131b, between the arms 31b and 131a, and between the arms 31b and 131b. Are close enough. For this reason, the first and second outer tubes 14, 114 are restricted from turning around the central axis C0.

そして、図18Aに示すように、内側管12の第3環状縁部(他の縁体)122及び第2外側管114の第3開口縁部132を上側に向けて、内側管12の第3環状縁部122の中心軸に第2外側管114の第3開口縁部132のC字状縁部132aの中心軸を一致させる。その後、第2外側管114の第3開口縁部132のC字状縁部132aを通して、内側管12の第3環状縁部122に連結ピン(他の連結体)116の内側嵌合部42を嵌合させる。   Then, as shown in FIG. 18A, the third annular edge (other edge) 122 of the inner tube 12 and the third opening edge 132 of the second outer tube 114 are directed upward, and the third tube 12 of the inner tube 12 is moved upward. The central axis of the C-shaped edge 132a of the third opening edge 132 of the second outer tube 114 is aligned with the central axis of the annular edge 122. Thereafter, the inner fitting portion 42 of the connecting pin (other connecting body) 116 is connected to the third annular edge 122 of the inner tube 12 through the C-shaped edge 132 a of the third opening edge 132 of the second outer tube 114. Fit.

図19Aから図19Cに示すように、第2外側管114の先端が第1外側管14の先端に対して相対的に近接するように、第2外側管114を内側管12に対して移動させる。そして、内側管12の第4環状縁部(第3縁体)124の中心軸に第2外側管114の第4開口縁部134のC字状縁部134aの中心軸を一致させる。内側管12の第4環状縁部124及び第2外側管114の第2開口縁部134を上側に向ける。その後、第2外側管114の第4開口縁部134のC字状縁部134aを通して、内側管12の第4環状縁部124に連結ピン(第3連結体)118の内側嵌合部42を嵌合させる。   As shown in FIGS. 19A to 19C, the second outer tube 114 is moved relative to the inner tube 12 so that the tip of the second outer tube 114 is relatively close to the tip of the first outer tube 14. . Then, the central axis of the C-shaped edge 134 a of the fourth opening edge 134 of the second outer pipe 114 is made to coincide with the central axis of the fourth annular edge (third edge) 124 of the inner pipe 12. The fourth annular edge 124 of the inner tube 12 and the second opening edge 134 of the second outer tube 114 are directed upward. Thereafter, the inner fitting portion 42 of the connection pin (third connection body) 118 is connected to the fourth annular edge portion 124 of the inner tube 12 through the C-shaped edge portion 134 a of the fourth opening edge portion 134 of the second outer tube 114. Fit.

図20Aから図20Cに示すように、第2外側管114の先端が第1外側管14の先端に対して相対的に離隔するように、第2外側管114を内側管12に対して移動させる。   20A to 20C, the second outer tube 114 is moved with respect to the inner tube 12 so that the tip of the second outer tube 114 is spaced apart from the tip of the first outer tube 14. .

このとき、第1及び第2連結ピン16,18が内側管12及び第1外側管14から脱落するのが防止されているとともに、第1及び第2連結ピン116,118が内側管12及び第2外側管114から脱落するのが防止されている。このため、連結ピン16,18を内側管12及び第1外側管14から脱落させずに内側管12に対して第1外側管14を取り付けることができるとともに、連結ピン116,118を内側管12及び第2外側管114から脱落させずに内側管12に対して第2外側管114を取り付けることができる。   At this time, the first and second connection pins 16 and 18 are prevented from falling off from the inner tube 12 and the first outer tube 14, and the first and second connection pins 116 and 118 are connected to the inner tube 12 and the first tube 12. 2 It is prevented from falling off the outer tube 114. Therefore, the first outer tube 14 can be attached to the inner tube 12 without dropping the connecting pins 16 and 18 from the inner tube 12 and the first outer tube 14, and the connecting pins 116 and 118 are connected to the inner tube 12. In addition, the second outer tube 114 can be attached to the inner tube 12 without dropping from the second outer tube 114.

そして、内側管12の第1環状縁部22に配設された第1連結ピン16と内側管12の外周面との間、第1連結ピン16と第1外側管14の第1開口縁部32との間に接着剤を塗布する。内側管12の第2環状縁部(第3縁体)24に配設された第2連結ピン16と内側管12の外周面との間、第2連結ピン16と第1外側管14の第2開口縁部34との間に接着剤を塗布する。内側管12の第3環状縁部122に配設された第3連結ピン116と内側管12の外周面との間、第3連結ピン116と第2外側管114の第3開口縁部132との間に接着剤を塗布する。同様に、内側管12の第4環状縁部(第3縁体)124に配設された第2連結ピン118と内側管12の外周面との間、第2連結ピン16と第2外側管114の第4開口縁部134との間に接着剤を塗布する。   And between the 1st connection pin 16 arrange | positioned by the 1st annular edge 22 of the inner side pipe | tube 12, and the outer peripheral surface of the inner side pipe | tube 12, the 1st opening edge part of the 1st connection pin 16 and the 1st outer side pipe | tube 14 An adhesive is applied between the two. Between the second connecting pin 16 disposed on the second annular edge (third edge) 24 of the inner tube 12 and the outer peripheral surface of the inner tube 12, the second connecting pin 16 and the first outer tube 14. An adhesive is applied between the two opening edges 34. Between the third connecting pin 116 disposed on the third annular edge 122 of the inner tube 12 and the outer peripheral surface of the inner tube 12, the third connecting pin 116 and the third opening edge 132 of the second outer tube 114, Apply an adhesive in between. Similarly, the second connecting pin 16 and the second outer tube are disposed between the second connecting pin 118 disposed on the fourth annular edge (third edge) 124 of the inner tube 12 and the outer peripheral surface of the inner tube 12. Adhesive is applied between the fourth opening edge 134 of 114.

以上説明したように、この実施形態によれば、以下のことが言える。
内側管12に対して2つの外側管14,114を接続することができる。このため、この実施形態に係る管連結構造10によれば、2つの管を接続するだけでなく、3つの管を接続することができる。
また、この実施形態では、第2実施形態で説明したように内側管12に対して第1外側管14を連結し、さらに、内側管12に対して第2外側管114を連結することができる。内側管12と第1外側管14との連結、内側管12と第2外側管114との連結はそれぞれ独立している。このため、内側管12と第1外側管14との間の引っ張り耐性及びねじり耐性は第2実施形態で説明した構造と同様に発揮することができる。同様に、内側管12と第2外側管114との間の引っ張り耐性及びねじり耐性は第2実施形態で説明した構造と同様に発揮することができる。
As described above, according to this embodiment, the following can be said.
Two outer tubes 14, 114 can be connected to the inner tube 12. For this reason, according to the pipe connection structure 10 according to this embodiment, not only two pipes but also three pipes can be connected.
In this embodiment, the first outer tube 14 can be connected to the inner tube 12 and the second outer tube 114 can be connected to the inner tube 12 as described in the second embodiment. . The connection between the inner tube 12 and the first outer tube 14 and the connection between the inner tube 12 and the second outer tube 114 are independent. For this reason, the tensile resistance and the torsion resistance between the inner tube 12 and the first outer tube 14 can be exhibited in the same manner as the structure described in the second embodiment. Similarly, the tensile resistance and torsion resistance between the inner tube 12 and the second outer tube 114 can be exhibited in the same manner as the structure described in the second embodiment.

また、第1外側管14に1対のアーム31a,31bを形成し、第2外側管114に1対のアーム131a,131bを形成し、アーム同士を嵌合させることができる。このため、第1外側管14と第2外側管114との中心軸C0の軸周りのガタツキを抑制することができる。   Moreover, a pair of arms 31a and 31b can be formed on the first outer tube 14, and a pair of arms 131a and 131b can be formed on the second outer tube 114, and the arms can be fitted together. For this reason, the backlash around the central axis C0 between the first outer tube 14 and the second outer tube 114 can be suppressed.

なお、この実施形態では、第1外側管14のアーム31aに第1開口縁部32を形成し、アーム31bに第2開口縁部34を形成したが、いずれか一方だけ形成されていることも好適である。この場合、第1実施形態で説明した構造と同様の構造により、内側管12と第1外側管14とを連結することができる。また、この実施形態では、第2外側管114のアーム131aに第3開口縁部132を形成し、アーム131bに第4開口縁部134を形成したが、いずれか一方だけ形成されていることも好適である。この場合、第1実施形態で説明した構造と同様の構造により、内側管12と第2外側管114とを連結することができる。   In this embodiment, the first opening edge 32 is formed on the arm 31a of the first outer tube 14 and the second opening edge 34 is formed on the arm 31b. However, only one of them may be formed. Is preferred. In this case, the inner tube 12 and the first outer tube 14 can be connected by a structure similar to the structure described in the first embodiment. In this embodiment, the third opening edge 132 is formed on the arm 131a of the second outer tube 114 and the fourth opening edge 134 is formed on the arm 131b. However, only one of them may be formed. Is preferred. In this case, the inner tube 12 and the second outer tube 114 can be connected by the same structure as that described in the first embodiment.

図21に示すように、先端側の第1湾曲管4aの最も基端側の湾曲駒5aを第2外側管114に一体に形成し、基端側の第2湾曲管4bの最も先端側の湾曲駒105aを第1外側管14に一体に形成しても良い。第2外側管14のうち、先端側(1対のアーム131a,131bとは反対側)に第1湾曲管4aの最も基端の湾曲駒5aを一体的に形成することができる。第1外側管14のうち、基端側(1対のアーム31a,31bとは反対側)に第2湾曲管4bの最も先端の湾曲駒105aを一体的に形成することができる。そして、内側管12を口金として用いることができる。   As shown in FIG. 21, the most proximal bending piece 5a of the first bending tube 4a on the distal end side is formed integrally with the second outer tube 114, and the most distal side of the second bending tube 4b on the proximal end side is formed. The bending piece 105a may be formed integrally with the first outer tube 14. Of the second outer tube 14, the bending piece 5a at the most proximal end of the first bending tube 4a can be integrally formed on the distal end side (the side opposite to the pair of arms 131a and 131b). Of the first outer tube 14, the bending piece 105a at the most distal end of the second bending tube 4b can be integrally formed on the base end side (the side opposite to the pair of arms 31a and 31b). The inner tube 12 can be used as a base.

管連結構造10は、通常の1つの湾曲部4(湾曲管5)と、その基端側に配置される可撓管3との接続に用いられる(図5B、図15(A)及び図15(B)参照)だけでなく、図21に示すように、第1湾曲管4aと第2湾曲管4bとの接続にも用いることができる。図示しないが、管連結構造10は、導入装置1の挿入部2の先端を構成する先端硬質部と湾曲部の湾曲管との接続にも用いることができる。   The tube connection structure 10 is used for connection between one ordinary bending portion 4 (bending tube 5) and the flexible tube 3 disposed on the base end side (FIGS. 5B, 15A, and 15). In addition to (see (B)), as shown in FIG. 21, it can also be used to connect the first bending tube 4a and the second bending tube 4b. Although not shown, the tube connection structure 10 can also be used for connection between the distal end hard portion constituting the distal end of the insertion portion 2 of the introducing device 1 and the bending tube of the bending portion.

これまで、いくつかの実施形態について図面を参照しながら具体的に説明したが、この発明は、上述した実施形態に限定されるものではなく、その要旨を逸脱しない範囲で行なわれるすべての実施を含む。   Although several embodiments have been specifically described so far with reference to the drawings, the present invention is not limited to the above-described embodiments, and all the embodiments performed without departing from the scope of the invention are not limited thereto. Including.

10…管連結構造、12…内側管、14…外側管、16…連結ピン、20…ボディ、20a…一端、20b…他端、22…環状縁部、22a…内側縁部、22b…外側縁部、30…ボディ、30a…一端、30b…他端、32…開口縁部、32a…C字状縁部、32b…長孔縁部、32c…閉塞端、42…内側嵌合部、44…外側嵌合部、C0…中心軸。   DESCRIPTION OF SYMBOLS 10 ... Pipe connection structure, 12 ... Inner tube, 14 ... Outer tube, 16 ... Connection pin, 20 ... Body, 20a ... One end, 20b ... Other end, 22 ... Annular edge, 22a ... Inner edge, 22b ... Outer edge 30 ... body 30a ... one end 30b ... other end 32 ... opening edge 32a ... C-shaped edge 32b ... long hole edge 32c closed end 42 ... inner fitting part 44 ... Outer fitting part, C0 ... central axis.

Claims (17)

基礎中心軸が規定される第1管状体と、
前記基礎中心軸に対して同軸上に前記第1管状体の外側に配設され、前記第1管状体に対して前記基礎中心軸の軸方向に沿ってスライド可能な第2管状体と、
前記第1管状体に形成された縁体と、
前記縁体に位置を重ねることが可能な第1縁部と、前記第1縁部に一体的に形成され、前記第1縁部に対して前記基礎中心軸の軸回り方向の幅が小さい、互いに対向する第2縁部とを有し、前記第2管状体に形成された開口縁部と、
前記縁体に嵌合される第1嵌合部と、前記第1嵌合部に一体的に形成され、前記第1嵌合部に対して前記基礎中心軸の軸回り方向の幅が小さく、前記開口縁部に保持される第2嵌合部とを有する連結体と
を具備する管連結構造。
A first tubular body in which a basic central axis is defined;
A second tubular body that is disposed coaxially with respect to the basic central axis and outside the first tubular body, and is slidable along the axial direction of the basic central axis with respect to the first tubular body;
An edge formed in the first tubular body;
A first edge capable of overlapping a position on the edge, and the first edge formed integrally with the first edge, the width of the base central axis around the axis being small with respect to the first edge; A second edge facing each other, and an opening edge formed in the second tubular body;
A first fitting portion that is fitted to the edge body; and a first fitting portion that is integrally formed with the first fitting portion, and a width in a direction around the axis of the basic central axis with respect to the first fitting portion is small; A pipe connection structure comprising: a connection body having a second fitting portion held by the opening edge portion.
前記開口縁部は、前記第2縁部と一体的に形成され、前記第1縁部に対して遠位にある第3縁部を有し、
前記第2嵌合部は、前記第1管状体の内周面で前記第1嵌合部を前記縁体に嵌合させた状態を維持しながら前記第2管状体と前記第1管状体とを前記基礎中心軸の軸方向に相対的に移動させて前記開口縁部の前記第1縁部から前記第2縁部を通して前記第3縁部に向かって移動して前記第3縁部に当接した状態で保持される、請求項1に記載の管連結構造。
The open edge has a third edge formed integrally with the second edge and distal to the first edge;
The second fitting portion includes the second tubular body and the first tubular body while maintaining a state in which the first fitting portion is fitted to the edge body on an inner peripheral surface of the first tubular body. Is moved relative to the axial direction of the basic center axis to move from the first edge of the opening edge to the third edge through the second edge and against the third edge. The pipe connection structure according to claim 1, wherein the pipe connection structure is held in contact.
前記第2嵌合部は、前記基礎中心軸に対する遠位端が前記第2管状体の外周面と同じかそれよりも前記基礎中心軸に近接する位置に配置される、請求項1に記載の管連結構造。   The said 2nd fitting part is arrange | positioned in the position where the distal end with respect to the said basic center axis | shaft is the same as the outer peripheral surface of the said 2nd tubular body, or a position closer to the said basic center axis. Pipe connection structure. 前記連結体の前記第1嵌合部のうち前記開口縁部を通して前記第1管状体から露出した部位と前記第1管状体の外周面との間には、樹脂材が塗布されている、請求項1に記載の管連結構造。   The resin material is apply | coated between the site | part exposed from the said 1st tubular body through the said opening edge part among the said 1st fitting parts of the said connection body, and the outer peripheral surface of the said 1st tubular body. Item 2. The pipe connection structure according to Item 1. 前記縁体は、前記第1管状体の外周面から内周面に向かって、前記連結体の前記第1嵌合部の外周面を嵌合可能なテーパ状に形成されている、請求項1に記載の管連結構造。   The said edge is formed in the taper shape which can fit the outer peripheral surface of the said 1st fitting part of the said connection body toward the inner peripheral surface from the outer peripheral surface of the said 1st tubular body. The pipe connection structure described in 1. 前記連結体の前記第1嵌合部は、前記第1管状体の厚さと同じかそれよりも薄い、請求項1に記載の管連結構造。   2. The pipe connection structure according to claim 1, wherein the first fitting portion of the connection body is equal to or thinner than a thickness of the first tubular body. 前記縁体は、前記基礎中心軸に直交する方向に貫通している、請求項6に記載の管連結構造。   The pipe connection structure according to claim 6, wherein the edge body penetrates in a direction orthogonal to the basic central axis. 前記連結体の前記第2嵌合部は、前記第2管状体の厚さと同じかそれよりも薄い、請求項1に記載の管連結構造。   The pipe connection structure according to claim 1, wherein the second fitting portion of the connection body is equal to or thinner than a thickness of the second tubular body. 前記第1管状体において、前記縁体とは前記基礎中心軸に対して周方向にずらした位置に形成された他の縁体と、
前記他の縁体に位置を重ねることが可能な他の第1縁部と、前記他の第1縁部に一体的に、前記他の第1縁部に対して前記基礎中心軸の軸回り方向の幅が小さい、互いに対向する他の第2縁部とを有し、前記第2管状体に前記開口縁部とは前記基礎中心軸に対して周方向にずらした位置に形成された他の開口縁部と、
前記連結体と同形状に形成された他の連結体と
を具備する、請求項1に記載の管連結構造。
In the first tubular body, the edge body is another edge body formed at a position shifted in the circumferential direction with respect to the basic center axis;
Another first edge that can be overlapped with the other edge, and integrally with the other first edge, around the axis of the basic central axis with respect to the other first edge Other second edges having a small width in the direction and opposed to each other, and the second tubular body is formed at a position shifted in the circumferential direction from the opening center with respect to the basic central axis The opening edge of
The pipe connection structure according to claim 1, further comprising: another connection body formed in the same shape as the connection body.
前記他の縁体は、前記縁体に対して、前記基礎中心軸の軸方向位置が一致し、周方向にずれている、請求項9に記載の管連結構造。   The pipe connection structure according to claim 9, wherein the other edge body is aligned with an axial position of the base central axis with respect to the edge body and is shifted in a circumferential direction. 前記他の第2縁部は、前記第2縁部に対して短く形成されている、請求項10に記載の管連結構造。   The pipe connection structure according to claim 10, wherein the other second edge portion is formed shorter than the second edge portion. 前記第2管状体は、その一端に近接する側に前記開口縁部が形成され前記開口縁部を通して前記縁体に前記連結体が嵌合される1対のアームを有し、
前記第1管状体に、前記縁体とは前記基礎中心軸に対して周方向にずらした位置に形成された他の縁体と、
他の1対のアームをその他端に近接する側に有し、前記基礎中心軸と同心状に前記第1管状体の外側に配設され、前記第1管状体に対して前記基礎中心軸に沿ってスライド可能な他の第2管状体と、
前記他の第2管状体の前記他の1対のアームに形成され、前記開口縁部とは異なる他の開口縁部と、
前記他の開口縁部を通して前記他の縁体に嵌合される他の連結体と
をさらに具備し、
前記第1管状体に対して前記第2管状体が前記連結体で保持され、前記第1管状体に対して前記他の第2管状体が前記他の連結体で保持された状態で、前記第2管状体の前記1対のアームの間に、前記他の第2管状体の前記他の1対のアームがそれぞれ嵌合されている、請求項1に記載の管連結構造。
The second tubular body has a pair of arms in which the opening edge is formed on a side close to one end of the second tubular body, and the connecting body is fitted to the edge through the opening edge.
In the first tubular body, the edge body is another edge body formed at a position shifted in the circumferential direction with respect to the basic center axis;
Another pair of arms is provided on the side close to the other end, and is disposed on the outer side of the first tubular body concentrically with the basic central axis, and is located on the basic central axis with respect to the first tubular body. Another second tubular body slidable along,
Another opening edge formed on the other pair of arms of the other second tubular body and different from the opening edge;
And further comprising another connecting body fitted to the other edge through the other opening edge,
In the state where the second tubular body is held by the connecting body with respect to the first tubular body, and the other second tubular body is held by the other connecting body with respect to the first tubular body, The pipe connection structure according to claim 1, wherein the other pair of arms of the other second tubular body is fitted between the pair of arms of the second tubular body.
前記第1管状体に、前記縁体及び前記他の縁体とは前記基礎中心軸に対して周方向にずらした位置に形成された1対の第3縁体と、
前記第2管状体の前記1対のアームと、前記他の第2管状体の前記他の1対のアームとにそれぞれ形成され、前記開口縁部及び前記他の開口縁部とは異なる第3開口縁部と、
前記第3開口縁部を通して前記第3縁体に嵌合される第3連結体と
を有し、
前記連結体、前記他の連結体、前記第3連結体は、それぞれ、前記開口縁部、前記他の開口縁部、前記第3開口縁部を通して前記縁体、前記他の縁体、前記第3縁体に嵌合される、請求項12に記載の管連結構造。
A pair of third edges formed on the first tubular body, the edges and the other edges being shifted in a circumferential direction with respect to the basic central axis;
The third pair of arms formed on the pair of arms of the second tubular body and the other pair of arms of the other second tubular body, respectively, are different from the opening edge and the other opening edge. An opening edge;
A third coupling body fitted to the third edge through the third opening edge,
The connection body, the other connection body, and the third connection body are respectively connected to the edge body, the other edge body, and the third connection body through the opening edge, the other opening edge, and the third opening edge. The pipe connection structure according to claim 12, wherein the pipe connection structure is fitted to a three-edge body.
前記縁体、前記他の縁体、前記第3縁体は、前記第1管状体の前記基礎中心軸に対して周方向に90度の間隔で形成され、
前記第2管状体の前記1対のアームは、前記基礎中心軸に対して互いに対向し、
前記他の第2管状体の前記他の1対のアームは、前記基礎中心軸に対して互いに対向する、請求項13に記載の管連結構造。
The edge, the other edge, and the third edge are formed at intervals of 90 degrees in the circumferential direction with respect to the basic central axis of the first tubular body,
The pair of arms of the second tubular body are opposed to each other with respect to the basic central axis;
The pipe connection structure according to claim 13, wherein the other pair of arms of the other second tubular body oppose each other with respect to the basic central axis.
請求項1に記載の管連結構造を含む、孔内に挿入される挿入部を有する、導入装置。   An introduction device comprising an insertion portion that is inserted into a hole, including the pipe connection structure according to claim 1. 前記挿入部は、前記第1管状体に一体化される湾曲管と、前記第2管状体に一体化される口金とを有する、請求項15に記載の導入装置。   The introduction device according to claim 15, wherein the insertion portion includes a bending tube integrated with the first tubular body and a base integrated with the second tubular body. 前記挿入部は、前記第2管状体に一体化される湾曲管を有する、請求項15に記載の導入装置。   The introduction device according to claim 15, wherein the insertion portion includes a bending tube integrated with the second tubular body.
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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5680580A (en) * 1979-11-29 1981-07-01 Matsushita Electric Works Ltd Pipe joint
JPS5981886U (en) * 1982-11-26 1984-06-02 日本高圧コンクリ−ト株式会社 Tube joining device
JPS5982002U (en) * 1982-11-25 1984-06-02 オリンパス光学工業株式会社 Endoscope
JPS6036416U (en) * 1983-08-16 1985-03-13 三菱樹脂株式会社 perforated drain pipe
JPH1137344A (en) * 1997-07-24 1999-02-12 Awaji Sangyo Kk High strength connecting method of pipe and connecting device
JPH1156760A (en) * 1997-08-26 1999-03-02 Olympus Optical Co Ltd Endoscope
JP2000193173A (en) * 1998-12-28 2000-07-14 Sankei Seisakusho:Kk Pipe joint
JP2000271072A (en) * 1999-03-26 2000-10-03 Fuji Photo Optical Co Ltd Structure of tip part of endoscope insertion part
JP3074971U (en) * 2000-07-19 2001-01-30 隆文 岡本 Marked connecting pipe for handrail made of pipe
JP2004230201A (en) * 2004-05-20 2004-08-19 Olympus Corp Endoscope
JP2008259634A (en) * 2007-04-11 2008-10-30 Olympus Corp Connection structure of flexible tube for endoscope and annular connection member

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5680580A (en) * 1979-11-29 1981-07-01 Matsushita Electric Works Ltd Pipe joint
JPS5982002U (en) * 1982-11-25 1984-06-02 オリンパス光学工業株式会社 Endoscope
JPS5981886U (en) * 1982-11-26 1984-06-02 日本高圧コンクリ−ト株式会社 Tube joining device
JPS6036416U (en) * 1983-08-16 1985-03-13 三菱樹脂株式会社 perforated drain pipe
JPH1137344A (en) * 1997-07-24 1999-02-12 Awaji Sangyo Kk High strength connecting method of pipe and connecting device
JPH1156760A (en) * 1997-08-26 1999-03-02 Olympus Optical Co Ltd Endoscope
JP2000193173A (en) * 1998-12-28 2000-07-14 Sankei Seisakusho:Kk Pipe joint
JP2000271072A (en) * 1999-03-26 2000-10-03 Fuji Photo Optical Co Ltd Structure of tip part of endoscope insertion part
JP3074971U (en) * 2000-07-19 2001-01-30 隆文 岡本 Marked connecting pipe for handrail made of pipe
JP2004230201A (en) * 2004-05-20 2004-08-19 Olympus Corp Endoscope
JP2008259634A (en) * 2007-04-11 2008-10-30 Olympus Corp Connection structure of flexible tube for endoscope and annular connection member

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