JPH09297270A - Industrial endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an industrial endoscope capable of bending at a small curvature without causing molfunction such as buckling, etc., on an insertion part without thickening the insertion part. SOLUTION: The insertion part 3 of the endoscope is constituted so as to be provided with a first bendable metal spiral tube 14, a metal intertwined tube 15 stuck to the outer periphery of the first metal spiral tube 14, a resin tube 16 with a heat shrinkable property stuck to the outer periphery of the metal intertwined tube 15 and covering from the base end part of the metal intertwined tube 15 to the intermediate part and a second metal spiral tube 17 stuck to the outer periphery of the metal intertwined tube 15 of the part not covered by the resin tube 16. The part not covered by the resin tube 16 becoming resistance when the insertion part 3 is bent is bent at a radius of curvature smaller than the part covered by the resin tube 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an industrial endoscope having a flexible insertion portion.

[0002]

2. Description of the Related Art Conventionally, endoscopes have been used in the industrial field for nondestructive inspection of turbine blades inside plants and jet engines. An industrial endoscope having a flexible insertion portion is generally used for such an application.

Conventionally, the structure of the insertion portion of such an industrial endoscope has a flexible metal spiral tube, a metal braided tube closely attached to the outer periphery of the metal spiral tube, and the metal braided tube. It consisted of a resin tube closely attached to the outer circumference of the tube.
The resin tube, in terms of assemblability, slipperiness, etc.,
A Teflon-based heat-shrinkable tube is used.

Further, Japanese Utility Model Publication No. 63-7206 discloses that
There is disclosed a structure of an insertion portion in which a metal braided tube is sandwiched between two inner and outer metal spiral tubes, and the metal braided tube is covered with a resin tube.

Recently, even in industrial endoscopes,
There is an increasing demand for (1) a smaller radius of curvature when the insertion portion is bent, and (2) a smaller diameter of the insertion portion.

[0006]

However, in the structure of the insertion portion of the conventional industrial endoscope, since the resin tube is poor in elasticity, when the insertion portion is bent, wrinkles are formed inside the bend, and excessive bending occurs. However, there are problems such as buckling when bent, and the outside of the bend does not extend sufficiently to obtain a sufficiently small curvature. Also,
In the configuration of Japanese Patent No. 7206, there is a problem that the insertion portion has a large diameter because the insertion portion is composed of a multilayer tube.

The present invention has been made in view of these circumstances, and makes it possible to bend the insertion portion with a small curvature without causing a problem such as buckling in the insertion portion without increasing the diameter of the insertion portion. The purpose is to provide an industrial endoscope.

[0008]

An industrial endoscope according to the present invention comprises an insertion portion having a metal braided tube and a bendable metal spiral tube that is in close contact with the inner surface of the metal braided tube. A part of the insertion part is covered with a resin. With this configuration, the portion not covered with the resin that becomes a resistance when the insertion portion is bent is bent with a smaller radius of curvature than the portion covered with the resin.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 15 relate to an embodiment of the present invention, FIG. 1 is a configuration explanatory view showing the overall configuration of an industrial endoscope apparatus, and FIG. 2 is a partial cutaway showing the configuration of an insertion portion of an endoscope. Sectional drawing, FIG. 3 is an explanatory view showing the external configuration of the rotary treatment member, FIG. 4 is a sectional view showing the configuration of the endoscope attachment portion in the operation portion of the treatment device, and FIG. 5 shows the configuration of the distal end portion of the treatment device. FIG. 6 is an axial cross-sectional view, FIG. 6 is a radial cross-sectional view showing a cross section taken along the line BB of FIG. 5, and FIG. 7 is a plan view showing the end face of the tip portion of FIG.
8 is a radial cross-sectional view showing a cross section taken along the line AA of FIG. 5, FIG. 9 is an axial cross-sectional view showing a connection structure between a motor and a rotation treatment member inside the operation portion, and FIGS. 10 and 11 are rotation treatment members. And FIG. 12 is an operation explanatory view showing a mounting method of the endoscope insertion portion, FIG. 12 is an operation explanatory view showing a state in which tip members having different lengths are attached, and FIGS. 13 and 14 show endoscopic images at the time of grinding treatment. FIG. 15 is an axial cross-sectional view showing the configuration of the connecting portion between the operation portion and the guide tube in the main body of the treatment apparatus, which is an operation explanatory view.

In this embodiment, various treatments such as grinding are performed in the industrial field, and a configuration example of a treatment device used in combination with an endoscope is shown.

As shown in FIG. 1, a treatment device 1 includes a device body 2, an endoscope 4 having a removable insertion portion 3 which is detachable from the device body 2, and a distal end portion of the device body 2. And a plurality of tip members 5 each having a different length, and a tip-end grinding member 6 detachably attached to the tip portion of the tip member 5.
And a rotation treatment member 7 that performs grinding by rotating.

In the endoscope 4, a cylindrical grip portion 8 is continuously provided at a base end portion of the insertion portion 3, and the grip portion 8 is detachably attached to a box-shaped operation portion 9 of the apparatus body 2. Has been done. A light guide cable 10 extends from a side portion of the grip portion 8, and a light guide connector 11 is provided at an end portion of the light guide cable 10.

Inside the flexible insertion portion 3, a light guide fiber bundle for illumination, an objective optical system for observation, and an image fiber bundle, which are not shown, are arranged. The end of the image fiber bundle is extended to the inside of the grip portion 8, and the grip portion 8 is provided with an imaging optical system (not shown) that is connected to the image fiber bundle. The light guide fiber bundle extends inside the light guide cable 10,
The end portion is connected to the inside of the light guide connector 11.

A mount portion (not shown) for mounting the TV camera 12 is provided at the end portion on the proximal side of the grip portion 8. The TV camera 12 is removably attached to the mount portion so that an endoscopic image of the region to be inspected obtained from the imaging optical system can be taken. In addition,
The endoscope 4 of the present embodiment is an endoscope dedicated to TV camera imaging, and has a configuration without an eyepiece member for visual observation.

The light guide connector 11 at the end of the light guide cable 10 is connected to the light source device 19.
Further, the TV camera 12 is connected with a liquid crystal monitor 20 and an image input device 21 via a signal line 22 and a T-shaped connector 23. The image input device 21 is further connected to a notebook personal computer (hereinafter referred to as a notebook PC) 24. With these, TV camera 12
The endoscopic image taken at is sent to the liquid crystal monitor 20 and the image input device 21, and can be observed at the liquid crystal monitor 20 and the notebook PC 24.

A power supply 25 for supplying electric power to each part is provided, and the power supply 25 is connected to a TV via a power cable 26.
The camera 12, the liquid crystal monitor 20, and the apparatus main body 2 are respectively connected to supply power to these apparatuses.

The notebook PC 24 stores software for image processing, for example, predetermined numerical values,
It contains comparative length measurement software to know what size will be obtained from the image, and can perform various processing based on the endoscopic image obtained.

The apparatus main body 2 has a box-shaped operation section 9 and a bending operation section 27 obliquely attached to the side surface of the operation section 9.
And a rigid guide tube 29 having a tip end portion 28 connected to the tip end side of the operation portion 9 and pivotally supported at the tip end portion.
And the endoscope 4 provided at the proximal end of the operation portion 9.
Endoscope mounting portion 30 for axially adjusting the mounting position of the
And two LEDs 31 for overload display and current supply display provided on the proximal end of the operation section 9, and an adjustment knob 32 for adjusting the rotation speed of the rotation treatment member 7 attached to the tip section. And a switch 33 for turning on and off the rotation of the rotation treatment member 7.

Inside the operation portion 9, a rotation treatment member 7 is provided.
There is provided a motor unit 35 including a motor 34 as shown in FIG. 9 for rotationally driving the motor, and an electric circuit (not shown) for controlling the rotation of the motor 34. And
The electric circuit, the motor 34, the two LEDs 31, the adjusting knob 32, and the switch 33 are electrically connected.
The electric circuit is also electrically connected to a power cable 26 connected to the apparatus body 2.

The tip end side of the power cable 26 is bifurcated, one of which is connected to the apparatus main body 2 and the other end thereof is provided with a second LED 36. The second LED 36 is electrically connected to the electric circuit, and displays the overload similarly to the LED 31 for displaying the overload.

A rotatable knob 37 is provided at the end of the bending operation portion 27. The knob 37 has a tip portion via a shaft member (not shown) that advances and retracts in accordance with the rotation of the knob 37. It is connected with 28. The plurality of tip members 5 are detachably attached to the tip portion 28, and the rotation treatment member 7 is detachably attached to the tip of each tip member 5.

Next, the structure of the insertion portion 3 of the endoscope 4 will be described with reference to FIG.

A tip forming member 13 is fixed to the tip of the insertion portion 3. Although not shown, an objective optical system, a tip portion of the image fiber bundle, and a tip portion of the light guide fiber bundle are disposed and fixed to the tip constituent member 13.

The insertion portion 3 of the present embodiment has a bendable first metal spiral tube 14, a metal braided tube 15 that is in close contact with the outer circumference of the first metal spiral tube 14, and a close contact with the outer circumference of the metal braided tube 15. A heat-shrinkable resin tube 16 that covers the metal braided tube 15 from the base end portion to the middle portion, and a second metal spiral that closely adheres to the outer periphery of the metal braided tube 15 at the portion not covered by the resin tube 16. And a pipe 17.

Both ends of the second metal spiral tube 17 are fixed to the metal braided tube 15 and the first metal spiral tube 14 by soldering. Also, the resin tube 1
6 is wound around the outer circumference of the tip end of 6
Is provided, and the thread winding portion 18 is fixed by adhesion. Furthermore, the thickness of the second metal spiral tube 17 (0.08
~ 0.1mm) is the thickness of the resin tube 16 (0.2mm)
It is configured to be thinner.

Instead of the heat-shrinkable resin tube 16, the metal braided tube 15 and the first and second metal spiral tubes 1 are used.
It may be configured by using an impregnating resin which is formed by impregnating the resin into the resin.

In the insertion portion 3 of this embodiment as described above,
Metal braided tube 15 which is a part of the entire length of the insertion portion on the proximal end side
Heat-shrinkable resin tube 16 from the base end to the middle
Since it is configured to be covered with, the resin tube 16 that becomes a resistance when the distal end portion of the insertion portion 3 is bent is bent.
The portion not covered with is bent with a smaller radius of curvature than the portion covered with the resin tube 16. That is, since there is a spiral gap in the second metal spiral tube 17 on the tip side, the radius of curvature of this portion is smaller than that in the configuration in which the tip is covered with the resin tube 16 having no gap.

Therefore, according to the present embodiment, it is possible to obtain a small radius of curvature when bending the insertion portion 3 without increasing the diameter of the insertion portion 3, and there is a problem such as buckling due to bending. Can be prevented.

Next, a detailed configuration of a portion for performing a grinding treatment by inserting the insertion portion 3 of the endoscope 4 and the rotation treatment member 7 into the guide tube 29 of the treatment device 1 will be described.

In non-destructive inspection of a turbine blade (hereinafter referred to as a blade) inside a jet engine using an industrial endoscope, damage such as a chip or a crack may be found at the edge of the blade. In this case, even if the damaged portion is small, if the jet engine is left as it is, the stress concentrates on the damaged portion, and the damaged portion may become large. When a damaged blade becomes unusable, the jet engine is typically disassembled and repaired. The damaged blade is removed from the engine, ground and repaired so that stress concentration does not occur at the damaged part, or replaced with a new one. However, if the engine was disassembled and a grinding process was performed every time a small damaged portion was found, there was a problem that repair would take too much cost and time.

Generally, a jet engine has a hole (hereinafter referred to as an access port) for inspecting a blade or the like.
However, it is provided for each blade. Therefore, a treatment device having a rotation treatment member attached to the distal end together with the industrial endoscope from this access port is inserted into the engine, and the rotation treatment member at the tip is opposed to the blade by bending the tip portion of the treatment device, Various industrial endoscope apparatuses have been proposed in which the rotating treatment member is rotated so that the damaged portion of the edge of the blade can be ground and treated without disassembling the engine.

As an industrial endoscope apparatus for performing such non-destructive treatment, Japanese Patent Laid-Open No. 4-102816 discloses
Disclosed is an industrial endoscope apparatus in which a grindstone for grinding a damaged portion of a blade is provided at a tip of an endoscope, and a shaft for rotationally driving the grindstone is movable in an axial direction of an insertion portion of the endoscope. ing. In addition, the applicant of the present invention is
In No. 7, as a means for enhancing adaptability to an access port for inspection, an endoscope for observation and a rotary treatment member for grinding can be attached, and a length of a distal end portion of an insertion portion can be changed. The proposed endoscopic treatment device has been proposed. Further, this endoscope treatment apparatus is provided with a means for preventing the detachable endoscope, the rotation treatment member, and the like from falling off.

When non-destructive treatment is performed using the industrial endoscope apparatus as described above, the distance from the access port to the blade differs for each blade, that is, for each position of the access port. Further, this distance differs depending on the engine model. Therefore, when performing the treatment, it is necessary to properly position the rotary treatment member of the treatment device at the treatment site in response to the change in the distance from the access port to the edge of the blade. Further, since such a treatment device is a device intended to repair the engine in a nondestructive manner, it is not allowed that its own parts such as the rotation treatment member fall into the engine during the work.

In the configuration of the above-mentioned Japanese Patent Laid-Open No. 4-102816, a flexible flexible shaft connected to a shaft for transmitting a rotational driving force is provided in order to cope with a change in the distance from the access port to the edge of the blade. By forcibly bending in the direction, the axial position of the grindstone at the tip of the insertion portion is adjusted. In such a structure, there is a problem that the rotational force for rotating the grindstone is partially lost at the bending portion and the grinding efficiency is reduced. In addition, since the distance between the tip of the observation optical system and the grindstone is not constant, the appearance of the grindstone in the observation field of view changes according to the distance between the tip of the observation optical system and the grindstone when grinding while observing. ,
There is also a problem that it is difficult to work.

In the structure of Japanese Patent Application No. 7-277917, by exchanging a plurality of removable tip members having different lengths, the distance from the access port to the edge of the blade can be changed. However, there is no consideration of means for adjusting the position of the rear end portion of the rotation treatment member or means for adjusting the mounting position of the endoscope according to the difference in the length of the tip member. Therefore, there is a problem that the endoscope and the rotary treatment member attached to the treatment device may not be able to adapt to the difference in the length of the distal end member. Further, in this endoscope treatment apparatus, the means for preventing the endoscope, the rotation treatment member, and the like from coming off is rotated about the retainer shaft against the retaining shaft against the biasing force of the plate-like elastic member. In this case, there is a problem that the locking portion on the endoscope side far from the retaining shaft is disengaged first.

Therefore, in the present embodiment, (1) there is little loss of the rotational force for performing the grinding treatment, the usability is improved, and the operability can be improved. (2) The distance from the access port for inspection to the treatment site The length of the distal treatment section can be adjusted appropriately according to the difference of the above, and the applicable range of the inspection target can be widened so that the versatility for various engines becomes high.
(3) An example of the configuration of a treatment device that achieves the above object, which eliminates the risk of parts falling off, is shown.

As shown in FIG. 3, the rotation treatment member 7 has a shaft portion 40 and a blade 41 formed of a cemented carbide cutter or a metal powder having diamond powder adhered to the surface thereof. The member 6 and the flexible shaft 43, which is a flexible rotational force transmission member in which one end is connected to the shaft portion 40 and the other end is connected to the rear cap 42, and a plurality of metals are wound coaxially in a plurality of layers.
And a cylindrical bearing (not shown) made of an oil-impregnated metal, in which the shaft portion 40 is rotatably fitted therein, a holder 44 coaxially arranging the bearing inside, and one end connected to an end portion of the holder 44. And a coil 45 having a tightly wound shape and having the flexible shaft 43 inserted therein.

On the outer periphery of the holder 44, a single trapezoidal projection 46 is formed. This protrusion 46
Is a shape in which tangent lines of the outer diameter of the holder 44 are approximately orthogonal to each other. The tip portion of the rear mouthpiece 42 has an oval cross section in which two flat surfaces are provided on the cylindrical surface in parallel with the central axis, and almost the entire length excluding the connecting portion with the flexible shaft 43 is an oval cross section. There is.

FIG. 4 shows the structure of the mounting portion of the endoscope 4 in the operating portion 9. A base 51 is fitted in the opening 50 of the operation unit 9. A common through hole 52 is provided in the side surface portion of the operating portion 9 and the base 51. The base 51 has a slide tube 5 having a notch 53 extending in the axial direction.
4 is inserted so that it can move back and forth. A female screw 55 is provided in a through hole penetrating laterally in the large diameter portion at the end of the slide cylinder 54.

Through the washer 56, the through hole 52 is
A fixing screw 57 having a slight clearance in the circumferential direction is loosely fitted in the notch 53. At the tip of the fixing screw 57,
Inside the slide cylinder 54, a nut member 58 having an arc matching the curvature of the inner diameter of the slide cylinder 54 is screwed onto one outer peripheral surface. An E-shaped retaining ring 59 is attached to the nut member 58 at a further distal end side of the fixing screw 57 with a gap therebetween.

A circular mounting groove 60 is provided on the distal end side of the grip portion 8 of the endoscope 4, and the distal end portion of the grip portion 8 is detachably fitted into the slide cylinder 54. . A set screw 62 having a protrusion 61 whose tip engages with the mounting groove 60 and is engaged with the female screw 55 of the slide cylinder 54. Further, a positioning groove 63 is formed in a circular shape at the tip of the insertion portion 3 of the endoscope 4.

Next, the structure of the portion where the tip end portion 28 and the tip end member 5 are attached at the tip end of the guide tube 29 of the apparatus main body 2 will be described with reference to FIGS.

As shown in FIG. 5, a tip end workpiece 70 is fixed to the tip end of the guide tube 29 with screws. A tip protrusion 71 is provided on the tip portion of the tip collar 70, and the tip protrusion 71 is combined with and connected to a connection notch 73 formed in the tip body 72. FIG. 6 shows the configuration of the connecting portion (cross-section taken along the line BB in FIG. 5) between the tip skirt 70 and the tip body 72.

The connection notch 73 and the tip projection 71 are provided with a connection hole 74 penetrating them, and a rotary shaft 75 is fitted in the connection hole 74. One end of the rotary shaft 75 is formed to have a large diameter, and an E-shaped retaining ring 76 is attached to the other end of the rotary shaft 75 so as to be fixed and prevented from coming off. With this connecting portion, the tip body 72
Is rotatably supported by the tip projection 71.
Both ends of the rotary shaft 75 are supported from both ends by a pressing spring 78 mounted so as to bend inside the deep hole 77.

The tip body 72 is provided with a first opening 79 and a second opening 80 penetrating in the axial direction. The rotation treatment member 7 is inserted through the first opening 79, and the insertion portion 3 is inserted through the second opening 80. Although not shown in the drawing, two insertion holes are also provided in the tip jumper 70 on the extension lines of the first and second openings 79 and 80, which communicate with the guide tube 29, and are inserted through the guide tube 29. The part 3 and the rotation treatment member 7 are guided to the tip part 28.

Returning to FIG. 5, one end of two shafts 81 is attached to the outer peripheral portion on the proximal side of the tip member 72. The shaft 81 is inserted through a guide pipe 82 fixed to the tip jumper 70, and together with the guide pipe 82, the operating portion 9
It is guided to the bending operation section 27 and is moved back and forth in conjunction with the rotation of the knob 37. The tip of the shaft 81 is bent at about 90 degrees and is attached to the fixing groove 83 of the tip jumper 70, and is fixed so as not to come off the fixing groove 83 by crimping around the fixing groove 83. Shaft 81
It is desirable that the material of (1) has superelasticity such as Ni-Ti alloy.

A male screw 84 is provided on the outer peripheral portion of the tip body 72.
A mounting screw 85 is screwed onto the male screw 84 so as to be able to move forward and backward. The mounting screw 85 is fitted on the tip body 72 on the inner diameter side. Further, a mounting hole 86 is provided in the tip body 72 in the axial direction so as not to penetrate therethrough.

At the tip portion of the tip body 72, the tip member 5
Is detachably installed. The tip member 5 is a tip body 72.
And a mounting base 87 having a recess for fitting
Mounting shaft 90 having a groove 89 in the middle, a pipe-shaped spacer 91 having one end fixed to the mounting base 87, and the other end of the spacer 91 fixed in a substantially cylindrical shape. Tip fixing 93 having stepped portion 92 on the tip side
And a cap 95 fixed to the tip fixing 93 and having an oval opening 94 at the tip, and a gap between the cap 95 and the tip fixing 93 (a space obtained by the stepped portion 92)
A mounting plate 96 movably disposed on the cap 95, a release pin 97 that is crimped and fixed to the mounting plate 96 through the opening 94 of the cap 95, and is arranged so as to bend between the inner periphery of the cap 95 and the mounting plate 96. A spring 9 which is provided and gives a biasing force to the mounting plate 96.
8 and.

The tip fixing 93 of the tip member 5, the mounting mouthpiece 87 and the cap 95 are rotated on the central axes of the first opening 79 and the second opening 80 provided in the tip body 72. An opening for inserting 7 and the insertion portion 3 is provided.

FIG. 7 shows the structure of the tip portion of the guide tube when the tip member 5 is viewed from the tip side. The spring 98 is made of a metal round wire or square wire and has a substantially elliptical shape as shown by a broken line in FIG. The mounting plate 96 has a substantially T shape as shown by the diagonal lines, and its width is formed slightly thinner than the positioning groove 63 at the tip of the insertion portion 3. The cap 95 and the tip end fixing 93 are provided with an accommodating portion 99 (indicated by a broken line) that accommodates the protrusion 46 (indicated by a chain double-dashed line) of the rotation treatment member 7.

The mounting plate 96 covers a part of the opening connected to the housing portion 99 of the tip fixing 93 and the second opening 80. Then, the mounting plate 96 is urged by the spring 98 toward the first and second openings 79 and 80, and abuts on the stepped portion 92. The release pin 97 is a cap 95.
It is located near the center of the opening 94.

In the structure of the tip member 5 thus constructed, the tip members 5 having different lengths can be formed by changing the length of the spacer 91.

FIG. 8 shows the structure of the portion where the tip member 5 is attached to the tip portion 28 (cross section taken along the line AA in FIG. 5).

Two housing holes 100 are provided in the tip body 72, and these holes are arranged so as to face each other in a substantially V shape toward the mounting hole 86 so that the inner diameter of the holes becomes smaller in the middle portion. . The storage hole 100 has a mounting hole 8 along the hole.
A sphere 101 that can move only inward and outward on the line connecting 6 and the storage hole 100 is engaged. After the ball 101 is engaged, the opening of the storage hole 100 is slightly deformed, so that the ball 10
No. 1 does not fall outside.

The diameter of the sphere 101 satisfies the respective requirements in the following two states. Mounting screw 85
When does not block the entrance of the storage hole 100, the amount of movement of the sphere 101 in the inward and outward directions is set to be larger than the height of the step of the groove 89. On the other hand, the mounting screw 85 is stored
When the inlet of 00 is closed, it is housed without a gap between the inner diameter of the mounting screw 85 and the outer diameter of the groove 89 as shown in FIG.

FIG. 9 shows a structure of a connecting portion between the motor unit 35 fixed inside the operation portion 9 and the rotation treatment member 7.

The motor unit 35 is arranged inside the operating portion 9 and is located on an extension of the central axis of the first opening 79. The motor 34, which is a DC motor or the like, is fixed to the operation unit 9 with screws or the like. A base fixing 103, which is a cylindrical member, is fixed to the rotating shaft 102 of the motor 34 with a screw. A rotary base 104 is inserted into the base fixing 103, and a screw is screwed and fixed through a hole 105 formed in a side surface of the base fixing 103.

A space pipe 106 and a bearing 107 are externally fitted to the tip of the spinneret fixing 103 on the rotating spinneret 104, and the spinneret fixing 103 and the bearing 107 are fitted by the space pipe 106.
The distance to and is positioned. A cover 108 is fixed to the front end side of the motor 34, and a bearing 107 abuts on a stepped portion of the inner diameter of the cover 108. The tip portion of the rotating mouthpiece 104 is shaped into a shape in which the outer diameter of the circular pipe member is squeezed in parallel to two places, and the inner diameter side is formed to an intermediate portion into an elliptical shape through which the rear mouthpiece 42 of the rotation treatment member 7 can be inserted. ing. It should be noted that the circular cross section remains the same except for the tip portion of the rotary base 104.

The cover 108, the bearing 107, the spacing tube 106, the rotary base 104, the fixed base 103, and the motor 34 (and the rotary shaft 102) are coaxially arranged. Then, the rear mouthpiece 42 of the rotation treatment member 7 inserted through the guide tube 29 is inserted into the tip portion of the rotating mouthpiece 104. The combined length of the rotating mouthpiece 104 and the rear mouthpiece 42 is configured to be longer than the difference in length of the plurality of tip members 5 (the difference in length between the longest tip member and the shortest tip member) described above. ing.

Next, the method of attaching the distal end member 5, the rotary treatment member 7, and the insertion portion 3 of the endoscope 4 when the treatment device 1 of the present embodiment is used and the operation thereof will be described.

First, a method for attaching the tip member 5 will be described with reference to FIGS. First, the mounting screw 85 of the tip body 72 is moved to the hand side to close the storage hole 100.
To open. This increases the amount by which the ball 101 can move in and out of the storage hole 100. Then, the tip member 5 is fitted onto the tip body 72, and at the same time, the mounting shaft 90 is also fitted into the mounting hole 86. At this time, the ball 10 is placed in the groove 89.
1 engages.

Thereafter, the mounting screw 85 is returned until it abuts on the tip body 72. Then, the storage hole 100 becomes the mounting screw 8
It is blocked by 5, and the ball 101 cannot move in the outer peripheral direction.
Then, the tip member 5 is pushed in the axial direction by the mounting screw 85, the groove portion 89 is pushed to the position of the sphere 101, and the groove portion 8 is pushed.
The sphere 101 is caught on 9.

With the above, the attachment of the tip member 5 is completed. Removal of the tip member 5 is performed in the reverse order of the above.

Next, a method for attaching the rotation treatment member 7 will be described with reference to FIGS. 7 and 10. First, the release pin 97
Is moved against the urging force of the spring 98, the mounting plate 96 moves in the arrow (upper direction in the figure) direction as shown in FIG. The storage portion 99 of is exposed from the tip. Then, the rear cap 42 of the rotation treatment member 7 is inserted from the tip of the tip member 5 into an insertion hole communicating with the first opening 79 of the tip fixing 93, and the projection 46 at the tip of the rotation treatment member 7 is inserted into the storage portion 99. To do. The rear mouthpiece 42 of the rotation treatment member 7 includes a cap 95, a tip fixing 93, a mounting mouthpiece 87, a tip body 72, a tip jumper 70,
And the motor unit 35 straight through the guide tube 29.
It is inserted into the rotary base 104 of the.

After that, when the movement of the release pin 97 is restored according to the urging force, as shown in FIG.
6 moves in the direction of the arrow (downward in the figure). In this state, since the mounting plate 96 covers the protrusion 46, the protrusion 46 does not fall off the tip.

With the above, the attachment of the rotation treatment member 7 is completed. The removal of the rotation treatment member 7 is performed in the procedure opposite to the above.

Finally, a method of attaching the insertion portion 3 of the endoscope 4 will be described with reference to FIGS. First, as in the case of the rotation treatment member 7, the release pin 97 is moved to the position shown in FIG.
The second opening 80 of the tip fixing 93 is moved as shown in FIG.
The insertion portion 3 is inserted into the insertion hole communicating with the operation portion 9 from the proximal side of the operation portion 9 as opposed to the rotation treatment member 7. Then, the mounting plate 96 and the positioning groove 63 at the tip of the insertion portion 3 are aligned. As for the positional relationship between the positioning groove 63 and the protrusion 46, as shown in FIG. 11, the positioning groove 63 and the mounting plate 96 are positioned so as to be engaged with each other, so that the positioning surface 63 is positioned relative to the reference surface 110 at the proximal end of the blade 41 of the rotation treatment member 7. Are positioned so that the tip of the insertion portion 3 is located on the rear side.

After that, when the movement of the release pin 97 is returned to the original state according to the urging force, the mounting plate 9 is returned as shown in FIG.
6 moves in the direction of the arrow (downward in the figure). As a result, the mounting plate 96 is attached to the positioning groove 63, and the insertion portion 3 cannot move back and forth.

With the above, the attachment of the insertion portion 3 of the endoscope 4 is completed. The insertion part 3 is removed in the reverse order of the above.

Referring to FIG. 12, when a plurality of tip members 5 having different lengths are exchanged, the rotation treatment member 7 and the endoscope 4 are replaced.
The positional relationship attached by will be described.

In FIG. 12, the difference between the state (a) and the state (b) is that the length of the tip member 5, the combined length of the motor unit 35 and the rear mouthpiece 42, and the attachment of the endoscope 4 are different. The position. Further, the same state in (a) and (b) is the total length of the insertion portion 3 of the endoscope 4, the total length of the rotary treatment member 7, and the length of the guide tube 29.

When the short tip member 5 is attached as shown in FIG. 12A, the rear cap 42 of the rotation treatment member 7 reaches the inside of the motor unit 35 (in the vicinity of the rotation shaft 102 of the motor 34). At this time, the endoscope mounting portion 30 of the operation portion 9 is operated according to the length of the insertion portion 3 to operate the endoscope 4.
To the retracted position. That is, when the fixing screw 57 is loosened, the nut member 58 advances to the tip side of the fixing screw 57,
The slide cylinder 54 fixed by the close contact of the nut member 58
Can be moved back and forth, so that the position of the endoscope 4 can be adjusted by retracting the slide cylinder 54. And the fixing screw 5
7 is tightened, the outer surface of the nut member 58 slides on the slide cylinder 54.
The slide cylinder 54 is fixed so as to be in close contact with the inner surface.

When the long tip member 5 is attached as shown in FIG. 12B, the rear mouthpiece 42 of the rotation treatment member 7 reaches the tip side of the motor unit 35 (the tip portion of the rotary mouthpiece 104). In this case, the endoscope 4 is fixed at a position advanced by the difference L in length of the tip member 5. The position adjusting method for the operation unit 9 of the endoscope 4 is the same as described above.

As described above, even when the tip members 5 having different lengths are exchanged for use, the endoscope 4 having one kind of length and the rotation treatment member 7 having one kind of length are used. It is possible to correspond to various lengths.

As described above, after the insertion portion 3 of the endoscope 4 and the rotary treatment member 7 are inserted and assembled into the guide tube 29 to form the treatment device 1, the guide tube 29 is not straightened by the tip portion 28. In this state, insert it into the jet engine's access port, which is the site to be inspected. Then, the knob 37 is rotated to rotate the tip end portion 28 about the rotation shaft 75, whereby the tip end portion 28 is bent. Thus the tip 2
By bending 8 the tip of the tip member 5 faces the blade inside the jet engine.

When the switch 33 is turned on in this state, the motor 34 rotates and the grinding member 6 at the tip of the rotation treatment member 7 rotates. At this time, the rotation speed of the motor 34 can be adjusted by rotating the adjustment knob 32. Then, the rotating grinding member 6 is pressed against the blade to grind the damaged portion of the blade.

If an overload is caused by the rotation of the motor 34 during the grinding process, one LED 3 for displaying the overload is displayed.
1 lights up, and the operator can be alerted. At this time, the second LED 36 is also turned on at the same time, and the second LED 36 is attached and used at an arbitrary position where it is easy to observe.

When grinding is performed by changing the access port, depending on the distance from the access port to the blade,
Select the tip member 5 and attach it. At the same time, the mounting position of the endoscope 4 is also adjusted.

As described above, in the configuration of the treatment device of this embodiment, since the flexible shaft 43 that rotates inside the operating portion 9 is straight, the rotation of the motor 34 is efficiently performed at the tip of the rotation treatment member 7. It is transmitted to the grinding member 6. Further, since the tip member 5 having a different length depending on the distance from the access port to the blade is used, the distance from the observation position (the position of the endoscope tip) to the grinding position (the position of the grinding member) is constant. Since there is no change in the field of view, it becomes easier to work and the workability can be improved. Furthermore, by exchanging the tip member 5, the endoscope 4 of one type and the rotation treatment member 7 of one type can be applied to any type of jet engine. Treatment member 7
Since it is not necessary to prepare several types, the setup work at the time of inspection and treatment is easy and the device cost can be reduced. Further, the tip member 5 is attached to the endoscope 4 which is inserted from the proximal side.
With the structure in which the rotation treatment member 7 is connected,
There is no risk of parts falling off.

Next, in the treatment apparatus 1 of this embodiment,
A means for measuring the target region based on the endoscopic image will be described.

A blade damaged and in need of repair is
When the engine is disassembled and taken out, and the damaged portion is ground and repaired, it is possible to easily repair it into a predetermined shape depending on the degree of damage. However, when performing non-destructive blade repair work inside the engine using an industrial endoscope device, it is necessary to confirm the repair status and repair shape through the endoscopic image. It is necessary to be able to measure each part based on this. The conventional configuration has a problem that it is not possible to easily measure the ground portion when performing the grinding work.

Therefore, the structure and operation of the measuring means, which is provided in the treatment apparatus according to the present embodiment, can measure the target region based on the endoscopic image and facilitate the work, will be described with reference to FIG. 13 and FIG. This will be described with reference to FIG.

As shown in FIG. 11, the blade 4 of the grinding member 6
A flat reference surface 110 is provided at a connection portion between the shaft 1 and the shaft portion 40. The reference surface 110 is inserted into the guide tube 29 of the treatment device 1 by the insertion portion 3 of the endoscope 4 and the rotary treatment member 7. When and are inserted and assembled into a use state, they are positioned at a predetermined position from the tip of the endoscope 4. As shown in FIG. 13, in the endoscopic image taken by the endoscope 4,
Blade 111 of jet engine and blade 4 of grinding member 6
The reference plane 110 provided on the No. 1 is visible.
The blade 111 has a grinding portion 112 that is cut out in an arc shape by grinding the grinding member 6.

A reference surface 110 is provided in advance at the connecting portion of the base end portion of the spherical blade 41 with the shaft portion 40.
The diameter of the 0 part is known. Blade 41 of grinding member 6
When the grinding work is performed, the wear reduces the diameter, but the dimension of the reference surface 110 does not change. The reference surface 110 is
The shape is not limited to a flat surface, and may be a conical surface.

When the treatment site is to be measured during the grinding operation, the blade 4 whose rotation is stopped as shown in FIG.
The reference plane 110 of No. 1 is hooked on the edge of the blade 111. In this state, the diameter of the reference surface 110, which is known in advance, is compared with the ground portion 112, and the dimension of the portion to be obtained from the observation magnification is measured on the endoscopic image.

By using such measuring means,
The tip end portion of the grinding member 6 as the treatment member can be easily positioned, and the comparative length measurement can be easily performed.

Next, in the treatment apparatus 1 of the present embodiment,
The configuration of the connecting portion between the operation portion 9 of the apparatus body 2 and the guide tube 29 will be described.

When non-destructively grind and repair the blade of the jet engine through the access port using the industrial endoscope apparatus, the operator cannot directly observe the ground portion, and the observation image by the endoscope can be viewed by the camera. You will be working while observing with a monitor. During such a grinding operation, it may be difficult to stably operate the tip end portion of the grinding member having the rotating blade by remote operation on the hand side. In this case, the condition that the rotating blade presses against the blade during grinding is not well transmitted to the operator side, so the blade is unexpectedly excessively pressed against the blade, the rotational force transmitting member is twisted, and the guide tube is bent. It may cause damage to the treatment device side. In the conventional configuration, the means for preventing the above-mentioned problems is not taken into consideration, and there is a problem in that it is not possible to prevent damage to the treatment device side that occurs when the grinding member is excessively pressed against the blade. It was

Therefore, in the present embodiment, an example of the configuration of a treatment device capable of notifying an operator before a trouble such as damage of the device occurs and performing a work without error will be described with reference to FIG. Explain.

FIG. 15 is an axial sectional view showing a connecting portion between the operation portion 9 of the apparatus main body 2 and the guide tube 29 in the treatment apparatus 1.

A stopper 120 made of a tubular member is fixed to the proximal end of the guide tube 29 with three stopper screws 120a (two are not shown). The end surface of the stopper 120 abuts the inner end surface of the fixed cylinder 121. An outer pipe 122 is fitted onto the outer circumference of the fixed cylinder 121, and the end portion of the outer pipe 122 is fixed by three fixing screws 123 (two are not shown). The front end portion of the fixing screw 123 protruding to the inner diameter side of the fixed cylinder 121 is loosely fitted in a screw hole 124 provided on the side portion of the stopper 120. The screw hole 124 is a hole that is provided so as not to penetrate toward the inner side in the circumferential direction, and is arranged so as not to interfere with the screw hole 124 and the stop screw 123. Outer diameter part of stopper 120 and fixed cylinder 12
A gap is formed between the inner diameter portions. The other end of the outer pipe 122 is connected and fixed to the operation unit 9.

The stopper 12 is provided on the inner diameter side of the fixed barrel 121.
A compression spring 125 is loosely fitted to the outer diameter portion of 0. Further, a female screw portion 126 is provided on the inner surface portion of the fixed barrel 121, and a spring fixing 127 is screwed into the female screw portion 126 from the rear end side, and the compression spring 125 is contracted by the spring fixing 127. ing. The proximal end of the guide tube 29 is arranged up to the spring fixing 127. A gap is formed between the outer peripheral surface of the guide tube 29 and the inner peripheral surface of the spring fixing 127.

In the structure of the connecting portion between the operating portion 9 and the guide tube 29, the reaction force of the compressed compression spring 125 acts as a biasing force for pressing the stopper 120 against the fixed barrel 121. In a normal state, the guide tube 29 is straight with respect to the fixed cylinder 121 by the urging force of the compression spring 125.

When a strong moment M acts on the tip end side of the guide tube 29, and only when a force larger than the biasing force of the compression spring 125 acts, the compression spring 125 contracts and the fixed barrel 121 and the stopper 120. The guide tube 29 and the stopper 120 are tilted as shown by the chain double-dashed line in the figure with the contact surface of the above as a fulcrum. The inclination of the guide tube 29 is until the guide tube 29 comes into contact with the inner peripheral surface of the spring fixing 127,
The guide tube 29 cannot bend further. The moment M acting on the tip side of the guide tube 29 is the compression spring 12
If the biasing force is less than 5, the guide tube 29 will not tilt.

By detecting the inclination of the guide tube 29, the operator can know whether the grinding member 6 on the tip side of the guide tube 29 is excessively pressed against the blade.

As described above, in the configuration of the treatment apparatus according to the present embodiment, even when the grinding member of the treatment apparatus is excessively pressed, the operator is in an excessively pressed state before the mounting itself is damaged. Therefore, it is possible to reliably perform the grinding work without fear of damaging the device.

[Supplementary Notes] (1) An industrial endoscope having an insertion portion including a metal braided tube and a bendable metal spiral tube that is in close contact with the inner surface of the metal braided tube, An industrial endoscope in which a part of the insertion portion is covered with resin.

(2) The industrial endoscope as set forth in appendix 1, wherein a part of the insertion portion on the proximal end side is covered with the resin.

(3) The industrial endoscope as set forth in appendix 1, wherein the resin is composed of a tube body having a mature shrinkage property.

(4) The industrial endoscope according to appendix 1, wherein the resin is an impregnated resin for the metal braided tube and the metal spiral tube.

(5) The industrial endoscope as set forth in appendix 1, wherein a portion of the insertion portion other than the portion covered with the resin is covered with a metal spiral tube.

(6) The insertion portion of the bendable endoscope having the observation optical system and the illumination optical system at the tip and the rotational force transmitting means for transmitting the rotational force to the rotation treatment member at the tip are inserted. What is claimed is: 1. An industrial endoscope apparatus having a rigid guide tube, and an operating portion connected to a proximal end portion of the guide tube, wherein the connecting portion between the guide tube and the operating portion has a bending function and a bending function. An industrial endoscope apparatus characterized in that a bent portion having a return function of the above is provided.

In the structure of appendix 6, the bending portion bends only when an excessive force acts on the distal end portion of the guide tube during the operation with the rotation treatment member, and the operator bends excessively before the device is damaged. It becomes possible to know that the force worked.

(7) The bent portion is provided at a locking portion provided at a tip portion of the operation portion and having an opening that allows the guide tube to freely penetrate, and an intermediate portion or an end portion inside the operation portion of the guide tube. 7. The industrial endoscope according to appendix 6, further comprising: a protruding portion that is provided and has an outer diameter larger than that of the opening; and an elastic member that presses the protruding portion against the locking portion. Mirror device.

(8) The industrial endoscope apparatus according to appendix 7, wherein the elastic member is a compression spring.

(9) The insertion portion of the bendable endoscope having the observation optical system and the illumination optical system at the distal end and the rotational force transmitting means for transmitting the rotational force to the rotational treatment member at the distal end are inserted. An industrial endoscopic device having a guide tube and an operating portion connected to a proximal end portion of the guide tube, wherein the distal end member is detachably attached to a distal end portion of the guide tube, and the distal end member is provided. Two openings communicating with the guide tube, a rotation treatment member that is insertable into and removable from one of the two openings from the tip direction, and that performs a treatment including grinding on a target member by rotation. Endoscope attachment means for attaching the endoscope that can be inserted into and removed from the rear portion of the operation portion to the other of the two openings, and a recess provided in the tip portion of the endoscope. And a protrusion provided near the tip of the rotation treatment member and the tip member A restriction member that is movably provided and that restricts the movement of the endoscope and the rotation treatment member in the axial direction by a catch so as not to move in the axial direction of the distal end member. An industrial endoscope apparatus, comprising: a release unit provided on the distal end member and capable of releasing a catch caused by the restriction member.

In the structure of Supplementary Note 9, the endoscope insertion portion and the rotation treatment member are connected to the distal end member by the regulation member, and the regulation member allows the concave portion of the endoscope insertion portion and the projection of the rotation treatment member to be connected. It is possible to attach and detach the tip member by hooking.

(10) The industrial endoscope apparatus according to appendix 9, wherein the recessed portion provided at the distal end portion of the endoscope is constituted by a circular groove.

(11) The industrial endoscope apparatus according to appendix 9, wherein the convex portion provided in the vicinity of the distal end portion of the rotation treatment member is a protrusion.

(12) The industrial endoscope apparatus according to appendix 9, wherein the releasing means provided on the tip member is composed of an elastic member that presses the regulating member against the tip member. .

(13) The industrial endoscope apparatus according to appendix 12, wherein the elastic member is made of a metal-made substantially rectangular wire or round wire.

(14) A reference indicating a predetermined position from the tip of the insertion portion when the insertion portion of the endoscope is inserted into the rotatably rotatably supported grinding member provided at the tip portion of the rotation treatment member. The industrial endoscope apparatus according to appendix 9, wherein a surface is provided.

In the structure of Supplementary Note 14, the dimensions of the reference plane known in advance and the dimensions of the target portion of the subject to be measured are compared on the endoscopic image, and the observation magnification known in advance is used. It is possible to obtain the size of the target part of the subject.

(15) The industrial endoscope apparatus according to appendix 14, wherein the reference surface is a flat surface.

(16) The industrial endoscope apparatus according to appendix 14, wherein the reference surface is a conical surface.

[0116]

As described above, according to the present invention, it is possible to bend an insert portion with a small curvature without causing a problem such as buckling in the insert portion without increasing the diameter of the insert portion. is there.

[Brief description of drawings]

FIG. 1 is a configuration explanatory view showing an overall configuration of an industrial endoscope apparatus according to an embodiment of the present invention.

FIG. 2 is a partially cutaway sectional view showing a configuration of an insertion portion of the endoscope according to the present embodiment.

FIG. 3 is an explanatory diagram showing an external configuration of a rotation treatment member.

FIG. 4 is a cross-sectional view showing a configuration of an endoscope attachment portion in the operation portion of the treatment device.

FIG. 5 is an axial cross-sectional view showing the configuration of the distal end portion of the treatment device.

FIG. 6 is a radial cross-sectional view showing a cross section taken along the line BB of FIG.

FIG. 7 is a plan view showing an end face of the tip portion of FIG.

8 is a radial cross-sectional view showing a cross section taken along the line AA of FIG.

FIG. 9 is an axial cross-sectional view showing a connection structure between a motor and a rotation treatment member inside an operation portion.

FIG. 10 is an operation explanatory view showing a method of attaching the rotation treatment member and the endoscope insertion portion.

FIG. 11 is an operation explanatory view showing a method of attaching the rotation treatment member and the endoscope insertion portion.

FIG. 12 is an operation explanatory view showing a state in which tip members having different lengths are attached.

FIG. 13 is an operation explanatory view showing an endoscopic image at the time of grinding treatment.

FIG. 14 is an operation explanatory view showing an endoscopic image at the time of grinding treatment.

FIG. 15 is an axial cross-sectional view showing the configuration of a connecting portion between the operation portion and the guide tube in the device body of the treatment device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Treatment device 2 ... Device main body 3 ... Insertion part 4 ... Endoscope 5 ... Tip member 6 ... Grinding member 7 ... Rotation treatment member 9 ... Operation part 29 ... Guide tube 30 ... Endoscope mounting part 13 ... Tip constituent member 14 ... First metal spiral tube 15 ... Metal braided tube 16 ... Resin tube 17 ... Second metal spiral tube

Claims (1)

[Claims] 1. An industrial endoscope having an insertion part having a metal braided tube and a bendable metal spiral tube that is in close contact with the inner surface of the metal braided tube, wherein An industrial endoscope characterized in that its part is covered with a resin.