JP3015062B2 - Industrial endoscope device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an industrial endoscope apparatus provided with a treatment member such as a rotation treatment member for grinding a chipped portion of a turbine blade of a jet engine at a distal end portion.

[Related Art] In recent years, industrial endoscopes capable of nondestructively inspecting a chemical plant, an engine, and the like have been widely used in the industrial field.

By the way, in a jet engine, damage such as chipping of a blade edge of a turbine blade that is rotationally driven may occur. In this case, if the damaged portion is left as it is even if the damaged portion is left as it is, stress concentrates on the damaged portion, the damaged portion becomes large, and it is necessary to replace the entire blade.

For this reason, even if replacement was not required in the past,
When damage was found, the engine was disassembled and grinded around the chipped area. However, this method has a drawback that it takes time for repair.

For this reason, for example, as shown in JP-A-58-162924, a rotating grindstone is attached to the distal end of the endoscope,
Grinding of a chipped portion without disassembling the engine is also performed by this grindstone.

[Problems to be Solved by the Invention] However, in the endoscope disclosed in the above publication, since the length of the distal end hard portion of the endoscope insertion portion is constant, for example, when treating a turbine blade located at various distances from an access port. There were sites where treatment could not be performed. Further, if an attempt is made to perform a treatment on a desired portion by changing the length of the rotating shaft having the rotating treatment member fixed to one end, the objective distance in the objective optical system changes, and the observation state cannot be kept constant.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an industrial endoscope apparatus capable of performing a treatment on a desired site while maintaining a constant observation state. I have.

[Means for Solving the Problems] An industrial endoscope apparatus according to the present invention includes a rigid portion having a distal end body that slides in an axial direction, a bendable portion connected to a base end side of the rigid portion, A treatment member provided so as to protrude from a distal end of the distal end portion main body, and a rotation transmitting member for rotating the treatment member through the hard portion and the bendable portion, wherein the rotation transmitting member is disposed in the axial direction. The rotation transmitting member is extended in accordance with the sliding movement of the distal end main body by fixing the distal end main body to the distal end of the rotation transmitting member while forming the distal end main body to be extensible.

[Operation] In the present invention, the distal end main body is fixed to the distal end of the rotation transmitting member formed so as to be extendable in the axial direction, whereby the rotation transmitting member is extended in accordance with the sliding of the distal end main body.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 relate to a first embodiment of the present invention. FIG. 1 is a sectional view of the distal end side of the insertion portion, and FIG.
FIG. 3 is a sectional view taken along line AA of FIG. 1 showing another example of a slide outer member and a slide inner member, and FIG. 4 is a side view showing the entire endoscope apparatus.

As shown in FIG. 4, the industrial endoscope apparatus includes an endoscope 1
And a light source device 20 and a rotation drive unit 10 connected to the endoscope 1, and a controller 22 connected to the rotation drive unit 10 via a cord 21.

The endoscope 1 includes an elongated insertion portion 101 and the insertion portion 101.
And a universal cord 19 extending laterally from the operating section 5. The end of the universal cord 19 is detachably attached to the light source device 20. A connector 102 to be connected is provided. Also,
An eyepiece 18 is provided at the rear end of the operation unit 5.

The insertion portion 101 is, in order from the distal end side, a hard distal end portion 2,
It comprises a bendable portion 3 and a hard portion 4 that can be bent. As shown in FIG. 1, the distal end portion 2 has a distal end main body 103 having a cylindrical shape. A cylindrical portion 104 is formed on the rear end side of the distal end portion main body 103, and a projecting portion 2a protruding inward is provided at the rear end of the cylindrical portion 104. The bending portion 3 has a plurality of ring-shaped bending pieces 26 rotatably connected to each other. The outer circumference of the bending piece 26 is covered with an outer skin 25. A cylindrical member 6 is provided at the front end of the curved portion 3, and a projection 6 a projecting outward is provided at the front end of the cylindrical member 6. And this cylindrical member 6
Is fitted inside the cylindrical portion 104 of the distal end main body 103 so that the distal end main body 103 can slide in the axial direction with respect to the cylindrical member 6. The projections 2a and 6a are formed so as to press the outer periphery of the cylindrical member 6 and the inner periphery of the cylindrical portion 104, respectively. Further, the tip portion main body 103 is prevented from coming off by the protrusions 2a and 6a.

An observation window, an illumination window, and an opening for a treatment member are provided on the distal end surface of the distal end portion main body 103. An objective optical system 23 is provided inside the observation window, and a distal end surface of the image guide 16 is disposed at an image forming position of the objective optical system 23.
The image guide 16 is inserted through the insertion section 101 and the operation section 5, and the rear end face faces an eyepiece (not shown) in the eyepiece 18. Then, the subject image formed by the objective optical system 23 is
The image is transmitted to the eyepiece 18 and is observed from the eyepiece 18. An illumination optical system 24 is provided inside the illumination window. The light guide 17 is connected to the rear end of the illumination optical system 24. The light guide 17 is inserted through the insertion section 101, the operation section 5 and the universal cord 19, and the incident end is connected to the connector 102. The illumination light emitted from the light source device 20 is incident on the incident end.

In addition, a rotational force transmitting member 8 covered with the protective tube 7 is inserted into the insertion portion 101. A slide outer member 9 is connected to a front end of the rotational force transmitting member 8.
In addition, the rear end of the rotational force transmitting member 8 passes through the operation unit 5,
It is connected to an output shaft of a motor (not shown) arranged in a rotation drive unit 10 connected to the operation unit 5. A slide inner member 11 is connected to the slide outer member 9. The outer slide member 9 and the inner slide member 11 are slidable in the axial direction and have a shape capable of transmitting a rotational force in the rotational direction. That is, as shown in FIG. 2, for example, the slide inner member 11 is formed in a cross shape in a longitudinal section,
The slide outer member 9 is formed in the same shape as the slide inner member 11, and is provided with a hole through which the slide member 11 is inserted. Further, as shown in FIG. 3, the slide inner member 11 may be formed in a rectangular column shape, and the slide outer member 9 may be provided with a hole having the same shape as the slide inner member 11.

A rotation shaft 12 is connected to a front end of the slide inner member 11. The rotating shaft 12 penetrates the distal end main body 103, protrudes outside from the treatment member opening, and
The bearing 13 is rotatably supported on the tip body 103 by the three bearings 13. A spacer 70 is provided between the two bearings 13. A fixed ring 71 is provided on the outer peripheral portion of the rotating shaft 12 at a position rearward of the bearing 13 on the rear end side.
Is fixed. The fixed ring 71 and the stepped portion of the rotating shaft 12 formed on the front side of the front end bearing 13 form a bearing.
13 and 13 and the spacer 70, the rotating shaft 1
2 and bearings 13 and 13 are fixed.

The outer diameter of the rotating shaft 12 on the distal end side from the step portion is larger than the outer diameter on the rear end side from the step portion. Further, a female screw portion is provided at the tip of the rotating shaft 12, and a male screw portion of a rotation treatment member 14 having a grindstone is detachably screwed to the female screw portion.

The front end of the protective tube 7 is connected to the distal end body 103 via a pipe 15, and the rear end passes through the operation unit 5 and is disposed in the rotation drive unit 10.

Further, the image guide 16 and the light guide 17 are
The tip section main body 103 is slackened in the operation section 5 so that it can slide with respect to the bending section 3.

 Next, the operation of the present embodiment will be described.

The distal end main body 103 of the distal end portion 2 is
That is, when sliding in the axial direction with respect to the bending portion 3,
The length of the hard portion due to the distal end side of the curved portion 3, that is, the distal portion main body 103 and the cylindrical member 6 changes. At this time, since the distal end body 103 and the cylindrical member 6 are pressed by the projections 2a and 6a, respectively, the distal end body 103 can be fixed to the cylindrical member 6 at an arbitrary position.

When grinding the chipped portion of the turbine blade of the jet engine, as shown in FIG. 4, the insertion portion 101 of the endoscope 1 is inserted from the access port 105 into the jet engine. When a motor (not shown) in the rotation drive unit 10 is driven, the rotational force is transmitted to the rotating shaft 12 through the rotational force transmitting member 8, and the rotational treatment member 14 is rotated. Then, the chipped portion of the turbine blade 106 is ground by the rotation treatment member 14.

As described above, according to this embodiment, the distal end portion 2 provided with the objective optical system 23 and the rotation treatment member 14 is slid in the axial direction with respect to the curved portion 3 so that the length of the rigid portion at the distal end portion can be freely set. Can be changed to Thus, the length of the distal end hard portion can be selected for the member to be treated under the optimum observation conditions, and thus the treatment can be performed in a state where it is easy to observe.

5 to 7 relate to a second embodiment of the present invention. FIG. 5 is a sectional view of the distal end side of the insertion portion, FIG. 6 is a front view of the holding member, and FIG. 7 is a perspective view of the holding member. It is.

In this embodiment, as shown in FIG.
A circumferential groove 2b is provided on the outer periphery of the rear end. A circumferential groove 26b is also provided on the outer periphery of the front end of the foremost bending piece 26a. A cylindrical holding member having an engaging portion at each of the front and rear ends for engaging with the grooves 2b and 26b.
The foremost bending piece 26a and the tip end body 103 are connected to each other by 30.

As shown in FIGS. 6 and 7, the holding member 30
The two semi-cylindrical members 31, 32 are connected by a hinge 33. The end 31a of the semi-cylindrical member 31 and the end 32a of the semi-cylindrical member 32 are configured to engage with each other by pressing them.

In this embodiment, a plurality of holding members 30 having an arbitrary length are prepared, one of the holding members 30 is selected, and the distal end body 103 is bent by the selected holding member 30.
To be fixed.

As described above, according to the present embodiment, the holding member having an arbitrary length is provided.
By using 30, it is possible to change the length of the hard portion on the distal end side of the curved portion 3. Therefore, the treatment can be performed in an optimal observation state.

Other configurations, operations and effects are the same as those of the first embodiment.

8 and 9 relate to a third embodiment of the present invention.
FIG. 9 is a sectional view of the distal end side of the insertion portion, and FIG. 9 is an explanatory diagram showing a state where the insertion portion is inserted into the jet engine.

In the present embodiment, the distal end portion 2 having an arbitrary length can be detachably fixed to the front end of the curved portion 3.

As shown in FIG. 8, the distal end portion 2 and the curved portion 3 are formed separately. A male screw part is provided on the outer periphery of the front end of the bending part 3.
3a is provided. Further, a fitting member 42 attached to the front end of the rotational force transmitting member 8 is provided at the front end of the bending portion 3.
In addition, a cover glass 116 bonded to the distal end surface of the image guide 16 and a cover glass 117 bonded to the distal end surface of the light guide 17 are provided.

On the other hand, the distal end portion 2 has a cylindrical distal end portion main body 103,
The distal end body 103 is provided with a through hole for observation, a through hole for illumination, and a through hole for a treatment member. An objective optical system 23 is provided in the observation through-hole. This objective optical system 23
Is designed to form a subject image on the distal end surface of the image guide 16. Further, an illumination optical system 24 is provided at the front end side of the illumination through hole, and a light guide 118 is provided at a rear end of the illumination optical system 24. The rear end face of the light guide 118 faces the cover glass 117. A rotating shaft 12 is rotatably held in the through hole for the treatment member via bearings 13 and 13. As in the first embodiment, a spacer 70 is provided between the bearings 13, 13, and a rear end bearing is provided on the outer peripheral portion of the rotating shaft 12.
A fixing ring 71 is fixed to the rear position of the thirteen. Also,
At the rear end of the rotating shaft 12, a fitting member 41 that fits into the fitting member 42 is provided. The fitting members 41, 42
The shape is such that the rotational force can be transmitted by fitting each other. A rotation treatment member 14 is attached to the front end of the rotation shaft 12.

A ring-shaped fixing member 40 is rotatably fitted on the outer periphery of the distal end portion main body 103. This fixing member 40
The rearward movement is regulated by the inwardly protruding projection 40b provided at the front end of the fixing member 40 and the step 103a formed at the outer periphery of the rear end of the front end body 103. It is supposed to be. Further, the fixing member 40
A female screw portion 40a is provided on the rear end side of the female screw portion 40a.
Is adapted to be screwed into the male screw portion 3a of the bending portion 3.

In the present embodiment, the ring-shaped fixing member 40 is turned in a state where the distal end portion 2 is pressed against the front end of the curved portion 3 so that the fitting members 41 and 42 are fitted, and the female screw portion 40a and the male screw portion 3a Are screwed together to fix the distal end portion 2 to the curved portion 3. The tip 2 is prepared in various lengths.

According to the present embodiment, as shown in FIG. 9, by attaching the distal end portion 2 having an arbitrary length to the bending portion 3, the length of the hard portion on the distal end side of the bending portion 3 can be changed. For this reason, even if the distance (Da, Db) from the center axis of the hard part 4 to the grinding part changes due to the shape of the turbine blade 106, etc.
The treatment can be performed under optimal observation conditions.

Other configurations, operations and effects are the same as those of the first embodiment.

Next, two examples in which the length of the bendable portion of the bending portion 3 can be changed will be described.

10 to 15 relate to a first example in which the length of the bendable portion of the bending portion can be changed.
FIG. 11 is an explanatory view showing a state in which the insertion portion is inserted into the jet engine, FIG. 11 is a cross-sectional view showing a rear end side of the bending portion, and FIG. 12 is a rear end side of the bending portion in a modified example of the present embodiment. FIG. 13 is a perspective view showing the C-ring in FIG. 12, and FIG.
FIG. 14 is a cross-sectional view showing a rear end side of a curved portion in another modification of the present embodiment, and FIG. 15 is a cross-sectional view showing another state in the modification of FIG.

As shown in FIG. 10, by providing a rigid cylindrical member 50 for restricting the bending action at the rear end or the front end of the bending portion 3, the bendable portion of the bending portion 3 is shortened. When the shortened bending portion 3 is bent, the bending radius is reduced, so that the position of the rotation treatment member 14 changes. That is, the distance from the central axis of the hard portion 4 to the ground portion changes by l.

Thus, by providing the cylindrical member 50 that regulates the bending action, it is possible to easily change the grinding range.

The fixing of the cylindrical member 50 is performed, for example, as shown in FIG. That is, the last piece 51a of the bending tube 51 constituting the bending portion 3 is fitted and connected to the small diameter portion 4a at the tip of the hard portion 4, and the outer skin 25 is provided on the outer periphery of the bending tube 51. . The cylindrical member 50 is fixed to the hard part 4 by passing screws 53 through several screw holes 52 provided at the rear end thereof and pressing the hard part 4 with the tip of the screw 53. . To change the bending restriction point, loosen the screw 53,
The cylindrical member 50 is moved in the longitudinal direction, and the screw 53 is tightened again.

12 and 13 show another example of a method for fixing the cylindrical member 50. FIG. In this example, as shown in FIG. 12, a circumferential groove 4b is provided on the outer peripheral portion on the distal end side of the hard portion 4,
As shown in FIG. 13, an elastic ring (C ring) 54 having a cutout 54a is fitted into 4b. On the other hand, a plurality of circumferential grooves 50a are formed on the inner peripheral surface of the cylindrical member 50. The cylindrical member 50 is fixed to the hard portion 4 by fitting the ring 54 into the groove 50a. By applying an axial force to the cylindrical member 50, the position of the cylindrical member 50 with respect to the hard portion 4 changes.

14 and 15 show still another example of a method for fixing the cylindrical member 50. FIG. In this example, as shown in FIG. 14, a male screw 50b is provided at the rear end of the cylindrical member 50, and a fastening member 55 having a female screw 55a screwed with the male screw 50b is provided.
Are connected to the cylindrical member 50. The cylindrical member 50
An elastic ring 56 having elasticity is provided between the rear end face 50e and the front end face 55b of the inwardly protruding projection formed at the rear end of the fastening member 55. When the fastening member 55 is screwed into the rear end of the cylindrical member 50, the fastening member 55
Presses the elastic ring 56, and as shown in FIG. 15, the pressed elastic ring 56 expands in the radial direction and presses the inner periphery 55c of the rear end of the cylindrical member 50 and the outer periphery of the hard portion 4, Cylindrical member 50
And the hard part 4 can be fixed. Also, the hard part 4
Is provided with a step 4c at the tip thereof, and a step 50d is also provided on the inner periphery of the cylindrical member 50. This allows the male screw 5 to be used during use.
0b and the female screw 55a may be loosened, but when the cylindrical member 50 tries to come off in the distal direction of the insertion portion, the step 4c
50d is caught, preventing falling off.

Other configurations, operations and effects of this embodiment are the same as those of the first embodiment.

FIGS. 16 to 18 relate to a second example in which the length of the bendable portion of the bending portion can be changed.
FIG. 17 is a side view showing the entire endoscope apparatus, FIG. 17 is a longitudinal sectional view of the bending portion, and FIG. 18 is a sectional view taken along line BB of FIG.

In this example, as shown in FIG. 17, a hard rod-shaped curved length adjusting member 60 is inserted into the hard portion 4. Also,
As shown in FIG. 16, a bending length adjusting ring 61 is provided at the rear end of the operation unit 5. This curved length adjustment ring 61
Is connected to the bending length adjusting member 60 by a screw, cam and ring mechanism (not shown).
By turning, the bending length adjusting member 60 moves in the axial direction. Further, as shown in FIGS. 17 and 18, a guide 29 through which the bending length adjusting member 60 is inserted is provided in the bending piece.

In this example, when the bending length adjusting ring 61 is turned in one direction, the front end of the bending length adjusting member 60 passes through the guide 29 and is pushed to the front end side. When the bending length adjustment ring 61 is turned in the opposite direction, the bending length adjustment member 60 is pulled back to the operation section 5 side. Since the portion of the bending portion 3 where the bending length adjusting member 60 is present cannot be bent, the bending length adjusting member 61 is turned to push and pull the bending length adjusting member 60, thereby bending the bending portion as shown in FIG. The length of the bendable part of the part 3 can be changed arbitrarily. Therefore, it is possible to guide the rotary treatment member 14 to a desired position and perform a treatment operation.

Other configurations, operations and effects are the same as those of the first embodiment.

The present invention is not limited to the above embodiments. For example, the treatment member is not limited to a rotating grindstone, and may be a cutting blade or the like.

Further, the present invention can be applied to an electronic endoscope provided with a solid-state imaging device at an image forming position of an objective optical system.

[Effects of the Invention] As described above, according to the present invention, since a means for changing the length of the hard portion of the insertion portion is provided, it is possible to perform treatment on a desired portion while keeping the observation state constant. There is an effect that can be.

[Brief description of the drawings]

FIGS. 1 to 4 relate to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view of the distal end side of the insertion portion, and FIG.
FIG. 3 is a sectional view taken along line AA of FIG. 1 showing another example of the slide outer member and the slide inner member. FIG. 4 is a side view showing the entire endoscope apparatus. FIG. 7 to FIG. 7 relate to the second embodiment of the present invention, FIG. 5 is a sectional view of the distal end side of the insertion portion, FIG. 6 is a front view of the holding member, FIG. FIG. 9 and FIG. 9 relate to a third embodiment of the present invention.
8 is a cross-sectional view of the distal end side of the insertion portion, FIG. 9 is an explanatory view showing a state where the insertion portion is inserted into the jet engine, and FIGS. 10 to 15 are lengths of bendable portions of the bending portion. FIG. 10 is an explanatory view showing a state in which an insertion portion is inserted into a jet engine,
FIG. 11 is a cross-sectional view showing the rear end side of the bending portion, FIG. 12 is a cross-sectional view showing the rear end side of the bending portion in a modification of the present embodiment, and FIG.
FIG. 14 is a perspective view showing a C-ring in FIG. 12, FIG. 14 is a cross-sectional view showing a rear end side of a curved portion in another modification of this embodiment, and FIG. 15 is another modification in the modification of FIG. 16 to 18 relate to a second example in which the length of the bendable portion of the bending portion can be changed,
FIG. 16 is a side view showing the entire endoscope apparatus, FIG. 17 is a longitudinal sectional view of the bending portion, and FIG. 18 is a sectional view taken along line BB of FIG. DESCRIPTION OF SYMBOLS 1 ... Endoscope, 2 ... Tip part 3 ... Bending part, 4 ... Hard part 6 ... Cylindrical member, 14 ... Rotation treatment member 101 ... Insertion part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-162924 (JP, A) JP-A-63-135687 (JP, A) Fully open 62-132511 (JP, U) Really open 186283 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G02B 23/24

Claims (1)

(57) [Claims] 1. A rigid portion having a distal end main body that slides in an axial direction, a bendable portion connected to a proximal end side of the hard portion, and a treatment member provided to protrude from the distal end of the distal end main body. A rotation transmitting member for rotating the treatment member through the hard portion and the bendable portion, wherein the rotation transmitting member is formed to be extendable in an axial direction, and the tip main body is rotated. An industrial endoscope apparatus wherein the rotation transmitting member is extended in accordance with sliding of the distal end portion main body by fixing the rotation transmitting member to the distal end portion of the transmitting member.