JP2006296832A - Method for repairing endoscope apparatus, and endoscope apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for repairing an endoscope apparatus, which can enhance the efficiency of the utilization of a multi-lumen tube and which enables the multi-lumen tube to be easily repaired without a deterioration in the operability of the multi-lumen tube, and the endoscope apparatus. <P>SOLUTION: In the endoscope apparatus, a bendable bending part is provided in an endoscope inserting part to be inserted into a subject; the multi-lumen tube 23 with a plurality of cavity parts 24a and 24c is set in the bending part; and the bending part is bent via the multi-lumen tube 23 by selectively supplying and pressurizing a fluid into the plurality of void parts 24a and 24c, so that the endoscope inserting part can be directed in a desired direction. The method for repairing the endoscope apparatus includes a setting step of setting a pressure maintaining tube 52, which maintains pressure during pressurization in place of the void parts 24a and 24c, in at least one of the plurality of void parts 24a and 24c. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a repair method of an endoscope apparatus for observing a subject and the endoscope apparatus.

  In recent years, in various fields such as the medical field and the industrial field, by bending a bending portion provided in an endoscope insertion portion to be inserted into a subject, the endoscope insertion portion is directed in a desired direction. Various endoscope apparatuses for observing a specimen are used. As shown in FIG. 29A, these endoscope apparatuses are generally provided with a multi-lumen tube 102 including four air chambers 103a, 103b, 103c, and 103d in a bending portion. The air chambers 103a, 103b, 103c, 103d are selectively fed with air supplied from a cylinder to expand the air chambers 103a, 103b, 103c, 103d, thereby bending the bending portion 102 in a desired direction. This is known. That is, as shown in FIG. 29B, for example, when the air chamber 103a disposed above is expanded, the outer wall portion of the air chamber 3a is longer than the outer wall portion of the air chamber 103b disposed below. Stretched in the direction. Thereby, the bending portion is bent via the multi-lumen tube 102, and the endoscope insertion portion is directed downward.

Here, if the multi-lumen tube is damaged and punctured, the endoscope insertion portion does not operate properly, and it is necessary to repair the endoscope insertion portion. However, since various parts such as a CCD cable are usually provided in the multi-lumen tube, it is difficult to remove and repair only the multi-lumen tube. Therefore, a method has been proposed in which the multi-lumen tube at the punctured portion is cut and the remaining multi-lumen tube is drawn out to a predetermined position of the bending portion and reused (for example, see Patent Document 1).
Further, there has also been proposed one in which a plurality of pressurizing tubes extending in the length direction of the flexible tube are provided on the outer periphery of the flexible tube having a curved portion over the entire circumference of the flexible tube (for example, Patent Documents). 2).
JP 2001-258819 A JP-A-6-125868

However, in the method of cutting a multi-lumen tube as described in Patent Document 1, even when one air chamber is punctured, all four air chambers must be cut as a whole. There is a problem that waste occurs.
Further, in the case of providing a plurality of pressurizing tubes as described in Patent Document 2, it is possible to replace only one pressurizing tube, but it is necessary to provide a plurality of pressurizing tubes over the entire circumference. There is a problem that it becomes difficult to bend.

  The present invention has been made in view of such circumstances, can improve the utilization efficiency of the multi-lumen tube, and can easily make the multi-lumen tube without harming the operability of the multi-lumen tube. It is an object of the present invention to provide a repair method for an endoscope apparatus that can be repaired and an endoscope apparatus for the repair method.

In order to solve the above problems, the present invention provides the following means.
The invention according to claim 1 is provided with a bendable bending portion in an endoscope insertion portion to be inserted into a subject, and a multi-lumen tube having a plurality of hollow portions is installed in the bending portion, By selectively supplying and pressurizing fluid into the plurality of cavities, the bending portion is bent through the multi-lumen tube, and the endoscope insertion portion is directed in a desired direction to observe the subject. A method for repairing an endoscope apparatus, comprising: an installation step of installing, in at least one of the plurality of cavities, a pressure holding tube that holds the pressure during the pressurization in place of the cavities. It is characterized by that.

In the endoscope apparatus repair method according to the present invention, a pressure holding tube that holds the pressure at the time of pressurization is installed in at least one of the plurality of cavities instead of the cavities by the installation process. . Therefore, the pressure holding tube functions as a pressure chamber in place of the hollow portion.
Thereby, it is possible to easily repair only the punctured cavity without providing a plurality of pressurizing tubes on the outer periphery of the multi-lumen tube as in the prior art.

  The invention according to claim 2 is provided with a bendable bending portion in an endoscope insertion portion to be inserted into a subject, and a multi-lumen tube having a plurality of hollow portions is installed in the bending portion, By selectively supplying and pressurizing fluid into the plurality of cavities, the bending portion is bent through the multi-lumen tube, and the endoscope insertion portion is directed in a desired direction to observe the subject. An endoscopic apparatus repairing method for performing an excision step of excising an outer wall portion of the multi-lumen tube forming at least one of the plurality of cavities, and the outer wall portion by the excision step And an installation step of installing a pressure holding tube for holding the pressure at the time of the pressurization in place of the hollow portion in the hollow portion in a state where is cut off.

In the endoscope apparatus repair method according to the present invention, the outer wall portion of the multi-lumen tube forming at least one of the plurality of cavities is excised by the excision step. And the pressure holding tube which hold | maintains the pressure at the time of pressurization instead of this cavity part is installed in the cavity part of the state by which the outer wall part was excised by the excision process by the installation process.
Thereby, it is possible to easily repair only the punctured cavity without providing a plurality of pressurizing tubes on the outer periphery of the multi-lumen tube as in the prior art. Moreover, since the outer wall portion is excised, the pressure holding tube can be easily installed in the cavity portion.

  The invention according to claim 3 is provided with a bendable bending portion in an endoscope insertion portion to be inserted into a subject, and a multi-lumen tube having a plurality of hollow portions is installed in the bending portion, By selectively supplying and pressurizing fluid into the plurality of cavities, the bending portion is bent through the multi-lumen tube, and the endoscope insertion portion is directed in a desired direction to observe the subject. A method of repairing an endoscope apparatus for performing cutting, wherein a part of an outer wall portion of the multi-lumen tube forming at least one cavity portion is cut out of the plurality of cavity portions, and the at least one cavity portion is removed. Is divided into an open cavity portion that is opened by cutting the outer wall portion and a closed cavity portion that is left without cutting the outer wall portion, and an opening divided by the cutting and separating step. Sky In part, on behalf of the open cavity portion, and together with the closed cavity, characterized in that it and a placing step of placing a pressure holding tube for holding the pressure during the pressure.

In the endoscope apparatus repair method according to the present invention, a part of the outer wall portion of the multi-lumen tube forming at least one of the plurality of cavities is excised by the excision and separation step, At least one cavity is divided into an open cavity that is opened by cutting away the outer wall and a closed cavity that remains without being cut away. In the installation step, a pressure holding tube that holds the pressure during pressurization is installed in the open cavity portion in place of the open cavity portion and together with the closed cavity portion.
Thereby, it is possible to easily repair only the punctured cavity without providing a plurality of pressurizing tubes on the outer periphery of the multi-lumen tube as in the prior art. Moreover, since the outer wall portion is excised, the pressure holding tube can be easily installed in the cavity portion. Furthermore, since a part of the outer wall portion is excised, the utilization efficiency of the multi-lumen tube can be further improved.

  The invention according to claim 4 is provided with a bendable bending portion in an endoscope insertion portion to be inserted into a subject, and a multi-lumen tube having a plurality of hollow portions is installed in the bending portion, By selectively supplying and pressurizing fluid into the plurality of cavities, the bending portion is bent through the multi-lumen tube, and the endoscope insertion portion is directed in a desired direction to observe the subject. In the endoscope apparatus, the pressure holding tube that holds the pressure at the time of the pressurization is provided in at least one of the plurality of cavities instead of the cavities. .

In the endoscope apparatus according to the present invention, since at least one of the plurality of air chambers is provided with a pressure holding tube for holding the pressure at the time of pressurization instead of the hollow portion, the inside of the hollow portion is provided. When pressurized, the pressure is held by the pressure holding tube. When the pressure is further increased, the pressure holding tube expands and extends in the length direction, whereby the bending portion is bent.
Thereby, it can replace with a cavity part and a pressure holding tube can be functioned as a pressurization chamber, and can repair only a punctured cavity part easily.

  The invention according to claim 5 is provided with a bendable bending portion in an endoscope insertion portion to be inserted into a subject, and a multi-lumen tube having a plurality of hollow portions is installed in the bending portion, By selectively supplying and pressurizing fluid into the plurality of cavities, the bending portion is bent through the multi-lumen tube, and the endoscope insertion portion is directed in a desired direction to observe the subject. A part of the outer wall portion of the multi-lumen tube forming at least one cavity portion among the plurality of cavity portions is cut out, and the at least one cavity portion is the outer wall. It is divided into an open cavity part that is opened by cutting the part and a closed cavity part that is left without being cut off the outer wall part, and instead of the open cavity part, the open cavity part, And the occlusion With sinus unit, characterized in that the pressure holding tube for holding the pressure during the pressure is provided.

In the endoscope apparatus according to the present invention, when the inside of the at least one cavity is pressurized, the pressure is held by the closed cavity and the pressure holding tube. When the pressure is further increased, the closed cavity and the pressure holding tube expand and extend in the length direction, whereby the bending portion is bent.
Thereby, it can replace with an open cavity part, and can make a pressure holding tube function as a pressurization chamber with a closed cavity part, and can repair only a punctured cavity part easily.

  The invention according to claim 6 is the endoscope apparatus according to claim 5, wherein a plurality of the open cavities are formed along the length direction of the multi-lumen tube with the closed cavities interposed therebetween. The intermediate portion of the pressure holding tube in the length direction is provided with an intermediate thin portion having a diameter smaller than that of the other portion, and the intermediate thin portion is disposed in the closed cavity portion. To do.

In the endoscope apparatus according to the present invention, since the mid-diameter portion is disposed in the closed cavity portion, when the pressure holding tube tries to move in the length direction, the large-diameter portion positioned at both ends of the mid-diameter portion is used. A diameter part contacts the outer wall part of a multi-lumen tube, and the movement is controlled.
Thereby, it is possible to prevent the pressure holding tube from shifting in the length direction.

  The invention according to claim 7 is the endoscope apparatus according to any one of claims 4 to 6, wherein the proximal end portion of the pressure holding tube has a proximal end narrower than the other portions. A diameter portion is provided.

  In the endoscope apparatus according to the present invention, since the proximal end narrow diameter portion is provided at the proximal end portion of the pressure holding tube, when the pressure is applied from the proximal end narrow diameter portion, the sealing performance in the pressure holding tube is improved. Can be improved.

  The invention according to claim 8 is the endoscope apparatus according to any one of claims 4 to 7, wherein the pressure holding tube is detachably provided.

  In the endoscope apparatus according to the present invention, since the pressure holding tube is detachably provided, it can be easily repaired even when the pressure holding tube is punctured.

  The invention according to claim 9 is the endoscope apparatus according to any one of claims 4 to 8, wherein the pressure holding tube has substantially the same elasticity as the multi-lumen tube. And

In the endoscope apparatus according to the present invention, since the pressure holding tube has substantially the same elasticity as the multi-lumen tube, when the inside of the cavity is pressurized, the pressure holding tube expands in the same manner as the multi-lumen tube.
Thereby, the operability of the multi-lumen tube can be maintained.

  The invention according to claim 10 is the endoscope apparatus according to any one of claims 4 to 9, wherein the bellows along the length direction of the pressure holding tube is provided on a side wall portion of the pressure holding tube. A bellows portion extending in a shape is provided.

  In the endoscope apparatus according to the present invention, the side wall of the pressure holding tube is provided with a bellows portion extending in a bellows shape along the length direction of the pressure holding tube. Can be easily stretched in the length direction. Therefore, the bending portion can be easily bent, and the endoscope insertion portion can be efficiently directed in a desired direction.

  According to an eleventh aspect of the present invention, in the endoscope apparatus according to any one of the fourth to tenth aspects, an adhesion coil is provided on an outer periphery of the pressure holding tube.

  In the endoscope apparatus according to the present invention, since the contact coil is provided on the outer periphery of the pressure holding tube, not only can the expansion in the radial direction of the pressure holding tube be suppressed, but the length can be efficiently extended. In addition, damage to the pressure holding tube can be prevented. Moreover, generally the adhesion | attachment coil provided in the outer periphery of a multi-lumen tube can be made unnecessary.

  According to the present invention, it is possible to easily repair only the punctured cavity without providing a plurality of pressurizing tubes on the outer periphery of the multi-lumen tube as in the prior art, so that the operability of the multi-lumen tube is not impaired. The multi-lumen tube can be easily repaired, and the utilization efficiency of the multi-lumen tube can be improved.

(Embodiment 1)
Hereinafter, an endoscope apparatus repair method and an endoscope apparatus thereof according to a first embodiment of the present invention will be described with reference to the drawings.
First, an endoscope apparatus repaired by the endoscope apparatus repair method in the present embodiment will be described.
As shown in FIG. 1, the endoscope apparatus 1 includes an insertion portion (endoscope insertion portion) 2 that extends in a long shape, and a main body portion 3 that winds and stores the insertion portion 2. The main body portion 3 includes a cylindrical winding portion 3a around which the insertion portion 2 is wound, and disc-shaped flange portions 3b are provided at both ends in the length direction of the winding portion 3a. The winding part 3 a is provided with a connection part 8, and the insertion part 2 is detachably attached via the connection part 8. A cylinder 13 filled with air is provided in the winding portion 3a.

Further, the one flange portion 3b is provided with a plurality of connection portions 9, and the operation of the insertion portion 2 and the like is performed via the one connection portion 9 among the plurality of connection portions 9. A remote controller (remote controller) 4 is detachably attached. In addition, a display device 5 for displaying an observation image is detachably attached via another connection unit 9.
The other flange portion 3b is provided with a handle 10, and the insertion portion 2 is wound up by gripping the handle 10 and rotating the winding portion 3a.

Further, the above-described insertion portion 2 includes a long insertion body portion 17, and a connector 14 is provided at the proximal end of the insertion body portion 17. The connector 14 is attached to the connection portion 8. A bendable bending portion 18 is provided at the distal end of the insertion body portion 17, and a cylindrical distal end portion 37 having an electrode terminal 38 is provided at the distal end of the bending portion 18, as shown in FIG. It has been. Various cables 39 extending from the insertion main body portion 17 are passed through the bending portion 18, and one of the various cables 39 is connected to the electrode terminal 38. The other cable 39 is connected to a CCD 42 as an observation means provided in the distal end portion 37.
Further, the adapter 19 having the illumination unit 22 is detachably provided at the distal end portion 37. Electric power is supplied to the illumination part 22 via the electrode terminal 38, and illumination light for observation is irradiated.

  The bending portion 18 is provided with a cylindrical multi-lumen tube 23. The multi-lumen tube 23 is made of silicon and is configured to be elastically deformable. As shown in FIGS. 3 and 4, a cylindrical inner tube 28 made of silicon is inserted into the cylindrical hole 27 of the multi-lumen tube 23, and an inner coil 29 is inserted into the inner tube 28. Has been. Various cables 39 are passed through the inner coil 29. Note that the inner tube 28 is for suppressing the radially inward bulge and making it easier to extend in the length direction when cavities 24b, 24c, 24d and the like described later are expanded.

  The multi-lumen tube 23 is formed with four arc-shaped cavities 24 a, 24 b, 24 c and 24 d extending in the length direction of the multi-lumen tube 23 so as to surround the cylindrical hole 27. One of the four cavities 24a, 24b, 24c, and 24d will be described later. The other cavities 24b, 24c, and 24d are provided with a sealing portion 56 that is sealed with an adhesive or the like at the front end, and connected to the cylinder 13 shown in FIG. 1 at the rear end. The front end of the air supply path 55 is inserted. Thereby, the insides of the other cavities 24b, 24c, and 24d are kept airtight.

  Further, the multi-lumen tube 23 is inserted into the cylindrical outer tube 32. The outer tube 32 is for suppressing the outward bulge of the cavities 24b, 24c, 24d, etc., and making it easier to extend in the length direction. The outer tube 32 is made of an elastic member having solvent resistance, and is also for protecting the multi-lumen tube 23 from a solvent such as light oil.

  Further, a rear cap portion 33 is provided on the proximal end side of the outer tube 32, and a front cap portion 34 is provided on the distal end side. An outer coil 43 that extends from the front cap portion 34 to the rear cap portion 33 is provided on the outer peripheral surfaces of the front cap portion 34 and the rear cap portion 33. Further, a bending protection blade 46 extending in a cylindrical shape is provided outside the outer coil 43. The bending protection blade 46 is formed by weaving a metal wire, and cylindrical attachment portions 46a are provided at both ends in the length direction. Each of the attachment portions 46a is screwed to the front cap portion 34 and the rear cap portion 33, whereby the bending protection blade 46 is fixed. The insertion main body 17 is also provided with a cylindrical main body protection blade 47 shown in FIG.

  Furthermore, one hollow portion 24a in the present embodiment is configured by opening the outer wall portion 23a of the multi-lumen tube 23 by cutting away the both ends in the length direction. A curved tube (pressure holding tube) 52 made of silicon is detachably provided in the one cavity portion 24a. The bending tube 52 has the same stretchability as the multi-lumen tube 23, and is elastically deformed while maintaining its pressure by pressurizing the inside. In addition, the curved tube 52 is provided with a tube sealing portion 60 sealed with an adhesive or the like at the front end thereof, and the tip of the air supply path 55 is inserted into the rear end thereof. The air supply path 55 is fixed to the bending tube 52 by a thread clasp portion 61 that covers the outer periphery of the rear end portion of the bending tube 52. Thereby, the inside of the bending tube 52 is sealed and kept airtight. In addition, a yarn clasp portion 64 is provided on the outer periphery of the rear end portion of the multi-lumen tube 23, and each air supply path 55 is fixed to the multi-lumen tube 23 by the yarn clump portion 64.

  Under such a configuration, when the remote controller 4 is operated, air is supplied from the cylinder 13 through the air supply path 55 to the cavities 24a, 24b, 24c, 24d and the like, and pressurized. At this time, the other cavities 24b, 24c, and 24d are in an airtight state, and thus expand while holding the pressure during pressurization. On the other hand, since the curved tube 52 in an airtight state is provided in the one cavity portion 24a, the pressure at the time of pressurization is held by the curved tube 52. That is, the curved tube 52 functions as an air chamber (pressurizing chamber) instead of the hollow portion 24a. Accordingly, the bending portion 18 is bent through the multi-lumen tube 23 and the insertion portion 2 is directed in a desired direction. And the state ahead of the front-end | tip of the insertion part 2 is displayed as an observation image on the display apparatus 5, and various treatments are performed.

Next, a method for repairing the endoscope apparatus 1 according to the present embodiment will be described below with an example in which one hollow portion 24a of the multi-lumen tube 23 is punctured.
First, as shown in FIG. 5, the mounting screws 66 are removed from the mounting portions 46 a of the protection blade 46. Then, the protection blade 46 is slid to the distal end side of the insertion portion 2 and pulled out. Then, as shown in FIG. 6, the outer coil 43 is exposed. The outer coil 43 is removed from the rear cap part 33 and the front cap part 34 using a spatula or the like. And the removed outer coil 43 is pulled out from the insertion part 2, and the outer tube 32 is exposed as shown in FIG. Then, as shown in FIG. 8, the rear cap portion 33 and the front cap portion 34 are detached from the outer tube 32 and are slid in the length direction of the insertion portion 2. At this time, the rear cap portion 33 and the front cap portion 34 are removed from the outer tube 32 and are in a free state, but are kept connected to the outer tube 32 via the cable 39 or the like.

Then, with the cable 39 inserted, the outer tube 32 is slid to the distal end side of the insertion portion 2 to expose the multi-lumen tube 23 as shown in FIG. At this time, as shown in FIG. 10, the cavity portion 24 a still includes the outer wall portion 23 a and the curved tube 52 is not provided. Reference numeral 69 denotes a damaged portion that punctures the cavity 24a.
Then, as shown in FIG. 11, the outer wall portion 23 a forming the cavity portion 24 a is excised with a cutter or the like leaving both ends in the length direction of the multi-lumen tube 23 (excision step). Then, the cavity 24a is exposed and opened. The distal end of the air supply path 55 is extended from the opened cavity 24 a and inserted into the proximal end of the bending tube 52. The base end portion of the bending tube 52 into which the air supply path 55 is inserted is tied with a thread to fix the air supply path 55. This fixed portion becomes the yarn tightness portion 61 shown in FIG.

From this state, as shown in FIG. 12, the bending tube 52 is installed in the cavity 24a (installation step). Then, the bending tube 52 is slid to a predetermined position and positioned. At this time, the distal end of the bending tube 52 protrudes from the cavity 24a. Therefore, as shown in FIG. 13, the protruding portion is cut and the distal end portion of the bending tube 52 is sealed with an adhesive or the like. This sealed portion becomes the tube sealing portion 60 shown in FIG. As a result, the inside of the bending tube 52 is airtight.
Then, both ends in the length direction of the multi-lumen tube 23 are tied with a thread, and the curved tube 52 and the air supply path 55 are fixed. This fixed portion becomes the yarn clasp portion 64 shown in FIG.

  Further, as shown in FIG. 14, the outer tube 32 is slid to return to the original position covering the multi-lumen tube 23. Then, through a process reverse to the above, the curved portion 18 protected by the protective blade 46 is obtained as shown in FIG. The curved portion 18 at this time has a side cross section shown in FIG. Thereby, the repair of the puncture of the cavity portion 24a is completed, and the curved tube 52 functions as an air chamber instead of the cavity portion 24a as described above.

As described above, according to the endoscope apparatus 1 in the present embodiment, only the punctured cavity 24a can be easily repaired, and the utilization efficiency of the multi-lumen tube 23 can be improved. In addition, since it is not necessary to provide a plurality of pressure tubes in the multi-lumen tube 23 as in the prior art, the operability of the multi-lumen tube 23 can be maintained well.
Further, since the outer wall portion 23a is excised, the bending tube 52 can be easily installed in the open cavity portion 24a.
Further, since the bending tube 52 is detachably provided, the bending tube 52 can be easily replaced (repaired) even when the bending tube 52 is punctured.
Further, since the bending tube 52 has the same elasticity as the multi-lumen tube 23, the deformation amount due to expansion can be made the same before and after the repair, and the operability of the multi-lumen tube 23 can be improved. Can be maintained.

In the present embodiment, the bending tube 52 is provided, but the size, material, shape, and the like of the bending tube 52 can be changed as appropriate.
For example, as shown in FIG. 16, a proximal end narrow diameter portion 70 having a smaller diameter than other portions, that is, a distal end portion and a midway portion, may be provided at the proximal end portion of the bending tube 52. Then, the air supply path 55 is inserted and fixed in the proximal end narrow diameter portion 70. Thereby, the clearance between the inner peripheral surface of the bending tube 52 and the outer peripheral surface of the air supply path 55 can be closed, and the sealing performance in the bending tube 52 can be improved.

Moreover, for example, as shown in FIG. 17, a bellows portion 71 extending along the length direction may be provided on the side wall portion of the bending tube 52. Thereby, the curved tube 52 can be easily extended in the length direction at the time of expansion | swelling.
Furthermore, for example, as shown in FIG. 18, the curved tube 52 and the air supply path 55 may be connected via a tubular tube connecting member 73. The outer diameter of the tube connecting member 73 is set equal to or larger than the inner diameter of the proximal end portion of the multi-lumen tube 23, and the inner diameter of the tube connecting member 73 is set equal to or smaller than the outer diameter of the tip of the air supply path 55. Thereby, the curved tube 52 can be easily manufactured while improving the airtightness in the curved tube 52.

(Embodiment 2)
Next, a second embodiment of the present invention will be described.
19 and 20 show a second embodiment of the present invention.
19 and 20, the same components as those shown in FIGS. 1 to 18 are denoted by the same reference numerals, and the description thereof is omitted.
This embodiment and the first embodiment have the same basic configuration, and only the differences will be described here.

  The repair method for the endoscope apparatus 1 in the present embodiment includes an excision separation step instead of the excision step. That is, in the excision and separation step, the outer wall portion 23 a is excised from the damaged portion 69 formed in the middle position in the length direction of the multi-lumen tube 23 over the tip of the multi-lumen tube 23. Thereby, a part of the outer wall portion 23a is cut off. And as shown in FIG. 19, the cavity part 24a is divided into the open cavity part 50 opened by cutting the outer wall part 23a, and the closed cavity part 51 remaining without cutting the outer wall part 23a.

Then, similarly to the first embodiment, the bending tube 52 is installed at a predetermined position of the open cavity 50 in the installation process. Then, in accordance with the length of the open cavity 50, the distal end of the bending tube 52 is cut, and the remaining distal end portion of the bending tube 52 is sealed. Furthermore, the clearance between the outer peripheral surface of the proximal end small diameter portion 70 of the curved tube 52 and the inner peripheral surface forming the closed cavity portion 51 is sealed. As a result, the curved tube 52 and the closed cavity 51 communicate with each other, and the curved tube 52 and the closed cavity 51 are in an airtight state. Then, repair is performed in the same manner as in the first embodiment, and the endoscope apparatus 1 after repair is obtained.
In the endoscope apparatus 1 after such repair, when the inside of the cavity 24 a is pressurized, the open cavity 50 is provided with the curved tube 52. Instead, the pressure is maintained with the closed cavity 51. That is, the curved tube 52 functions as an entire air chamber in the cavity 24 a together with the closed cavity 51.

  As described above, not only the same effects as those of the first embodiment can be obtained, but also the utilization efficiency of the multi-lumen tube 23 and the curved tube 52 can be further improved because a part of the outer wall portion 23a is excised. .

(Embodiment 3)
Next, a third embodiment of the present invention will be described.
21 to 23 show a third embodiment of the present invention.
In the repair method of the endoscope apparatus 1 according to the present embodiment, only the outer wall portion 23a around the damaged portion 69 shown in FIG. As a result, as shown in FIG. 22, the cavity 24 a is divided into an open cavity 50 and two closed cavities 51, and the open cavity 50 is arranged between the two closed cavities 51. . In the installation step, the bending tube 52 is installed in the open cavity 50. At this time, the proximal end portion and the distal end portion of the bending tube 52 are arranged in the respective closed cavities 51. And each clearance between the outer peripheral surface of the base end part and front-end | tip part of the bending tube 52, and the internal peripheral surface which forms the obstruction | occlusion cavity part 51 is sealed. Thereby, as shown in FIG. 23, the base end sealing part 74 and the front end sealing part 75 are formed. As a result, the two closed cavities 51 communicate with each other via the curved tube 52, and the curved tube 52 and the two closed cavities 51 are in an airtight state.

  From the above, not only the same effects as in the first embodiment can be obtained, but also the utilization efficiency of the multi-lumen tube 23 and the bending tube 52 can be further improved.

(Embodiment 4)
Next, a fourth embodiment of the present invention will be described.
24 and 25 show a fourth embodiment of the present invention.
In the repair method of the endoscope apparatus 1 in the present embodiment, the outer wall portion 23a is excised from the damaged portion 69 shown in FIG. Further, the outer wall portion 23 a is cut out from the position spaced a predetermined distance from the damaged portion 69 over the rear end of the multi-lumen tube 23. As a result, the cavity 24 a is divided into a closed cavity 51 and two open cavities 50 as shown in FIG. 25, and the closed cavity 51 is disposed between the two open cavities 50. . That is, two open cavities 50 are formed along the length direction of the multi-lumen tube 23 with the closed cavity 51 interposed therebetween.

  Then, the air supply path 55 is attached to the curved tube 52. The curved tube 52 is provided with an intermediate narrow diameter portion 78 having a diameter smaller than that of the other portions, that is, the distal end portion and the proximal end portion, at an intermediate position in the length direction. The bending tube 52 is installed at a predetermined position in the cavity 24 a while sliding in the open cavity 50 and the closed cavity 51 in the installation process. At this time, the bending tube 52 is inserted into the closed cavity 51, and the midway narrow diameter portion 78 is arranged in the closed cavity 51. And repair is complete | finished similarly to the above, and the endoscope apparatus 1 after repair is obtained.

  In the endoscope apparatus 1 after repair, when the bending tube 52 tries to move in the length direction, the large diameter portions located at both ends of the intermediate thin diameter portion 78 come into contact with the outer wall portion 23a of the multi-lumen tube 23. Therefore, the movement is restricted.

  From the above, not only the same effects as in the first embodiment can be achieved, but also the displacement of the bending tube 52 in the length direction can be prevented.

(Embodiment 5)
Next, a fifth embodiment of the present invention will be described.
26 and 27 show a fifth embodiment of the present invention.
In the repair method of the endoscope apparatus 1 in the present embodiment, the outer wall portion 23a of the cavities 24a, 24b, 24c, and 24d is excised in the excision step. Then, as shown in FIG. 26, the air supply path 55 is attached to the bending tube 52, and a small-diameter coil (contact coil) 79 is put on the curved tube 52. As a result, the bending tube 52 is inserted into the small diameter coil 79. In the installation step, the bending tube 52 to which the small diameter coil 79 is attached is installed in the cavities 24a, 24b, 24c, and 24d, respectively.

  As described above, since the small diameter coil 79 is provided in each of the bending tubes 52, expansion of the bending tube 52 in the radial direction can be suppressed, and the bending tube 52 can be easily extended in the length direction. The outer coil 43 in the embodiment can be eliminated.

(Embodiment 6)
Next, a sixth embodiment of the present invention will be described.
FIG. 28 shows a sixth embodiment of the present invention.
The repair method for the endoscope apparatus 1 according to the present embodiment omits the excision step in the first embodiment. That is, the curved tube 52 to which the air supply path 55 is attached is inserted from the rear of the cavity 24a without excising the outer wall 23a. And it sends to a predetermined | prescribed position and installation of the bending tube 52 is complete | finished (installation process). In addition, the bending tube 52 is cut | disconnected according to the length of the cavity part 24a before insertion, and the front-end | tip part is sealed. And repair is complete | finished similarly to the above, and the endoscope apparatus 1 after repair is obtained.
As described above, only the cavity portion 24b can be repaired easily and quickly.

In the first to sixth embodiments, the repair method has been described. However, the repair procedure can be appropriately changed. For example, as described above, before installing the bending tube 52, it may be cut into a necessary length in advance or the tip portion may be sealed. For example, the air supply path 55 may be attached after the curved tube 52 is installed.
Moreover, although the curved tube 52 was made into cylindrical shape, it is not restricted to this, The shape can be changed suitably. For example, the bending tube 52 may be configured to be flat so that it can be easily accommodated in the cavities 24a, 24b, 24c, and 24d. Moreover, you may use what the front-end | tip of the bending tube 52 is closed beforehand.

Furthermore, in the first to fourth embodiments and the sixth embodiment, the bending tube 52 is provided in one hollow portion 24a. However, the present invention is not limited to this, and the installation number and installation position are as follows. It can be changed appropriately according to the damage.
The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

1 is an overall configuration diagram showing a first embodiment of an endoscope apparatus according to the present invention. It is a disassembled perspective view which expands and shows the insertion part of FIG. It is a figure which expands and shows the insertion part of FIG. 1, Comprising: It is a perspective view which shows a mode that the protection blade was removed. It is a sectional side view which expands and shows the curved part of FIG. It is a figure which shows the repair method of the endoscope apparatus which concerns on this invention, Comprising: It is explanatory drawing which shows a mode that the screw was removed from the protection blade. It is a figure which shows the repair method of the endoscope apparatus which concerns on this invention, Comprising: It is explanatory drawing which shows a mode that the protection blade was removed from the insertion part. It is a figure which shows the repair method of the endoscope apparatus which concerns on this invention, Comprising: It is explanatory drawing which shows a mode that the outer coil was removed from the insertion part. It is a figure which shows the repair method of the endoscope apparatus which concerns on this invention, Comprising: It is explanatory drawing which shows a mode that the front nozzle | cap | die part and the rear nozzle | cap | die part were removed from the outer tube. It is a figure which shows the repair method of the endoscope apparatus which concerns on this invention, Comprising: It is explanatory drawing which shows a mode that the outer tube was slid and the multi-lumen tube was exposed. It is a figure which shows the repair method of the endoscope apparatus which concerns on this invention, Comprising: It is explanatory drawing which expands and shows the multi-lumen tube of FIG. It is a figure which shows the repair method of the endoscope apparatus which concerns on this invention, Comprising: It is explanatory drawing which shows a mode that the outer wall of the multi-lumen tube was excised. It is a figure which shows the repair method of the endoscope apparatus which concerns on this invention, Comprising: It is explanatory drawing which shows a mode that the bending tube was installed in the open cavity part. It is a figure which shows the repair method of the endoscope apparatus which concerns on this invention, Comprising: It is explanatory drawing which shows a mode that the curved tube was installed and the thread clasp part was formed. It is a figure which shows the repair method of the endoscope apparatus which concerns on this invention, Comprising: It is explanatory drawing which shows a mode that the outer tube was returned to the multi-lumen tube of FIG. It is a figure which shows the repair method of the endoscope apparatus which concerns on this invention, Comprising: It is explanatory drawing which shows a mode that the protection blade was returned to the outer coil of FIG. It is explanatory drawing which shows the modification of the bending tube of FIG. 4 and FIG. It is explanatory drawing which shows the other modification of the bending tube of FIG. 4 and FIG. It is explanatory drawing which shows the other modification of the bending tube of FIG. 4 and FIG. It is a figure which shows 2nd Embodiment of the repair method of the endoscope apparatus which concerns on this invention, Comprising: It is explanatory drawing which shows a mode that the multilumen tube was damaged. It is explanatory drawing which shows a mode that the outer wall part of FIG. 19 is excised and a curved tube is installed. It is a figure which shows 3rd Embodiment of the repair method of the endoscope apparatus which concerns on this invention, Comprising: It is explanatory drawing which shows a mode that the multilumen tube was damaged. It is explanatory drawing which shows a mode that the outer wall part of FIG. 21 is excised and a curved tube is installed. It is explanatory drawing which shows a mode that two obstruction | occlusion cavities were sealed. It is a figure which shows 4th Embodiment of the repair method of the endoscope apparatus which concerns on this invention, Comprising: It is explanatory drawing which shows a mode that the multilumen tube was damaged. It is explanatory drawing which shows a mode that the outer wall part of FIG. 24 is excised and a curved tube is installed. It is a figure which shows 5th Embodiment of the repair method of the endoscope apparatus which concerns on this invention, Comprising: It is explanatory drawing which shows a mode that a curved tube is penetrated by a small diameter coil. It is explanatory drawing which shows a mode that the bending tube of FIG. 26 was installed in the multi-lumen tube. It is a figure which shows 6th Embodiment of the repair method of the endoscope apparatus which concerns on this invention, Comprising: It is explanatory drawing which shows a mode that a curved tube is inserted in a cavity part. It is a figure which shows the conventional multi-lumen tube, Comprising: (a) is a perspective view which shows the mode before pressurization, (b) is a sectional side view which shows a mode that the multi-lumen tube curved.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Endoscope apparatus 2 Insertion part (endoscope insertion part)
18 Curved portion 23 Multi-lumen tube 23a Outer wall portions 24a, 24b, 24c, 24d Cavity 50 Open cavity 51 Closed cavity 52 Curved tube (pressure holding tube)
70 base end narrow diameter part 71 bellows part 78 middle narrow diameter part 79 small diameter coil (adhesion coil)

Claims (11)

A bending portion that can be bent is provided in an endoscope insertion portion that is inserted into a subject, and a multi-lumen tube having a plurality of cavities is installed in the bending portion, and the endoscope is selectively provided in the plurality of cavities. Repair of an endoscope apparatus for observing the subject with the endoscope being inserted in a desired direction by bending the bending portion through the multi-lumen tube by supplying a fluid to the tube and pressurizing it. A method,
A repair method for an endoscope apparatus, comprising: an installation step of installing, in at least one of the plurality of cavities, a pressure holding tube that holds the pressure during the pressurization in place of the cavities. A bending portion that can be bent is provided in an endoscope insertion portion that is inserted into a subject, and a multi-lumen tube having a plurality of cavities is installed in the bending portion, and the endoscope is selectively provided in the plurality of cavities. Repair of an endoscope apparatus for observing the subject with the endoscope being inserted in a desired direction by bending the bending portion through the multi-lumen tube by supplying a fluid to the tube and pressurizing it. A method,
A cutting step of cutting the outer wall of the multi-lumen tube forming at least one of the plurality of cavities;
An installation step of installing a pressure holding tube for holding the pressure at the time of pressurization in place of the hollow portion in the hollow portion in a state where the outer wall portion has been cut away by the cutting step. Endoscope repair method. A bending portion that can be bent is provided in an endoscope insertion portion that is inserted into a subject, and a multi-lumen tube having a plurality of cavities is installed in the bending portion, and the endoscope is selectively provided in the plurality of cavities. Repair of an endoscope apparatus for observing the subject with the endoscope being inserted in a desired direction by bending the bending portion through the multi-lumen tube by supplying a fluid to the tube and pressurizing it. A method,
A part of the outer wall part of the multi-lumen tube forming at least one cavity part is cut out of the plurality of cavity parts, and the at least one cavity part is opened by cutting the outer wall part. A cutting and separating step that separates the open cavity portion into a closed cavity portion that remains without being cut off from the outer wall portion;
An installation step of installing a pressure holding tube for holding the pressure at the time of pressurization in place of the open cavity portion and the closed cavity portion is provided in the open cavity portion separated by the cutting and separating step. An endoscopic device repair method characterized by the above. A bending portion that can be bent is provided in an endoscope insertion portion that is inserted into a subject, and a multi-lumen tube having a plurality of cavities is installed in the bending portion, and the endoscope is selectively provided in the plurality of cavities. An endoscope apparatus for observing the subject with the fluid being supplied and pressurized to bend the bending portion through the multi-lumen tube and direct the endoscope insertion portion in a desired direction. And
An endoscope apparatus, wherein at least one of the plurality of cavities is provided with a pressure holding tube that holds the pressure during the pressurization in place of the cavities. A bending portion that can be bent is provided in an endoscope insertion portion that is inserted into a subject, and a multi-lumen tube having a plurality of cavities is installed in the bending portion, and the endoscope is selectively provided in the plurality of cavities. An endoscope apparatus for observing the subject with the fluid being supplied and pressurized to bend the bending portion through the multi-lumen tube and direct the endoscope insertion portion in a desired direction. And
Of the plurality of cavities, a part of the outer wall of the multi-lumen tube forming at least one cavity is cut away, and the at least one cavity is opened by cutting the outer wall. Divided into an open cavity and a closed cavity left without being cut off the outer wall,
An endoscope apparatus, wherein a pressure holding tube for holding the pressure at the time of pressurization is provided in the open cavity portion in place of the open cavity portion and together with the closed cavity portion. A plurality of the open cavities are formed across the closed cavity along the length direction of the multi-lumen tube,
A midway narrow diameter part having a smaller diameter than the other part is provided at an intermediate position in the length direction of the pressure holding tube, and the midway narrow diameter part is disposed in the closed cavity. The endoscope apparatus according to claim 5.   The internal view according to any one of claims 4 to 6, wherein a proximal end narrow diameter portion having a smaller diameter than other portions is provided at a proximal end portion of the pressure holding tube. Mirror device.   The endoscope apparatus according to any one of claims 4 to 7, wherein the pressure holding tube is detachably provided.   The endoscope apparatus according to any one of claims 4 to 8, wherein the pressure holding tube has substantially the same elasticity as the multi-lumen tube.   The bellows part extended in the shape of a bellows along the length direction of this pressure holding tube is provided in the side wall part of the said pressure holding tube, The any one of Claims 4-9 characterized by the above-mentioned. Endoscope device. The endoscope apparatus according to any one of claims 4 to 10, wherein a contact coil is provided on an outer periphery of the pressure holding tube.

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