JPH03158818A - Industrial endoscope device - Google Patents

Abstract

PURPOSE:To reduce a loss due to the torsion of turning force transmission member by extending the base end side of the turning force transmitting member from the way of an insertion part to the outside of the insertion part, and connecting the extending part to a rotary driver. CONSTITUTION:In the case of inspecting the inside of a compressor blade 4, a light guide cable 6 is connected to a light source device 7, the turning force transmitting member 22 in a protection tube 17 is connected to the rotary driver 26 through a connecting member 28 and the tip side of the tube 17 is connected to the projection part 16 of a connection part 15 through a cap nut 17b. Since the turning force transmitting members 19, 22 are extended from the way of the insertion part 2 to the outside of the insertion part 2 and connected to the driver 26, the length of the members 19, 22 can be shortened as compared with the structure extending the turning force transmission member to the outside of the endoscope 1 through an operation part 3, the loss due to the torsion of the members 19, 22 can be reduced in accordance with the reduction of the length and workability also can be improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a comfortable endoscope device [4] that is capable of observing the inside of an aircraft 111 etc. and taking necessary measures. .

[Prior Art] In recent years, (industrial) endoscope devices having an insertion section that can be inserted into the smoke pipes of boilers, chemical plants, and even into the inside of turbines, engines, etc. are widely used. It is used.

For example, if the cutting edge of an engine's compressor blade breaks down, if this breakage is left untreated, stress will concentrate and the breakage will become larger, eventually requiring the entire blade to be replaced. There is. Therefore, regular examinations are performed using the above-mentioned endoscope. If a defect is discovered, it is disassembled, and if there is no need to replace it, measures are taken such as grinding the defective part (3) to prevent stress concentration.

However, with such means, it is necessary to disassemble the device even when repairing a minute part, and repair is time-consuming and troublesome.

For example, in Japanese Unexamined Patent Publication No. 58-162924, a bendable rotational force transmitting member is installed inside a flexible insertion part, and the distal end thereof is made to protrude from the distal end, and a grinding stone is attached to this protruding part. A technique in which a rotating treatment member such as the following is provided has been disclosed. The proximal end side of the rotational force transmitting part is extended from the operating part connected to the proximal end of the insertion part, and this extended end is connected to the rotational drive device.

When the rotation drive device is operated, rotation force is transmitted through the rotation force transmission means, and the rotation treatment member is rotated.

[Problems to be Solved by the Invention] However, when observing and treating the inside of an engine using an endoscope device having this configuration, the position of the operator with respect to the device to be observed varies, and the position of the operator varies. Depending on the position, the insertion section especially near the operating section is often curved with a small radius of curvature. When this part is curved, the rotational force transmitting member comes into contact with the protective plate covering the rotational force transmitting member, so that the rotational force is reduced.1. : In severe cases, JA scratches may occur on this protective tube.

Furthermore, vibrations caused by the rotation of the rotational force transmitting member may cause damage to built-in components such as an image guide and a light guide that are disposed close to the protective tube.

Further, the rotational force transmitting member is disposed over the entire length of the insertion portion, and it is difficult to shorten it. Therefore, it is difficult to reduce the loss due to twisting of the rotational force transmitting member.

FObject of the Invention The present invention has been made in view of these circumstances, and even if the insertion section near the operating section is curved with a small radius of curvature, the rotational force of the rotational force transmission member is In addition, the protective tube of the rotational force transmission member,
The object of the present invention is to provide an industrial endoscope device that prevents damage to built-in components and further reduces loss due to twisting of the rotational force transmitting member.

[Means for Solving the Problems] Industrial endoscopy according to the present invention? In one device, the distal end of the rotational force transmission member housed in the insertion section protrudes from the distal end, and the rotational treatment member is placed in this protruding region, while the proximal end of the rotational force transmission member is inserted into the insertion section. It extends out of the insertion portion from the middle of the insertion portion, and this extended portion is connected to the rotational drive device.

[Operation] With this configuration, the rotational force from the rotational drive device is transmitted via the rotational force transmission member to the rotational treatment member provided at the portion protruding from the distal end portion, and the rotational treatment device is rotated.

[Embodiments of the Invention] Hereinafter, embodiments of the industrial endoscope according to the present invention will be described with reference to the drawings.

1 to 4 relate to the first embodiment of the present invention, FIG. 1 is an overall view of the endoscope device, FIG. 2 is a plan view of part A in FIG. 1,
Figure 3 is a sectional view of the tip, Figure 4 is 8)'If of Figure 1.
It is a Qi plane view.

The endoscope g41 of this embodiment has a flexible insertion section 2 and an operation section 3 provided on the proximal end side of the insertion section. The insertion portion 2 is configured to be inserted into, for example, a compressor blade 4 via a holder 5. As shown in FIG. 1, this holder 5 is fixed to the side surface of the compressor blade 4, and has a holding hole 5a whose axis coincides with the insertion hole 4a provided on the side surface. The insertion part 2 is inserted through the holding hole 5a and the insertion hole 4a, and the fixing screw 5b provided in the holding hole 5a is inserted.
The insertion section 2 can be fixed at the .

Furthermore, a light guide cable 6 for internally connecting the light guide is extended from one side of the operation section 3, and is connected to the floor F
It is possible to connect to the light source device 7 disposed in the. The light guide within the light guide cable 6 is connected to a light guide 8 provided within the insertion section 2, and this light guide 8 extends to the distal end side of the insertion section 2.

A distal end portion 9 formed of a hard member is provided at the distal end of the insertion portion 2.
An illumination through hole 11 is formed parallel to the axis of the light guide 8, and the distal end of the light guide 8 faces the proximal end of the light distribution lens 11a fixed to the illumination through hole 11. Fixed. The illumination light from the light source device is transmitted through the light guide 8 to the tip 9, and the light distribution lens 1
It is designed to irradiate the difference site to be tested via the beam 1a.

Furthermore, an observation hole 12 is formed in the tip portion 9 in parallel with the illumination hole 11 . An objective lens 12a is fixed to the distal end of the observation hole 12, and the distal end of an image guide 13 is fixed to face the 1M end of the objective lens 12a. This image guide 13
The other end extends through the insertion section 2 to an eyepiece section 3a provided on the NOS side of the operation section 3, and the image of the observed region formed by the objective lens 12a is displayed as the above image. The light is transmitted to the eyepiece section 3a via the guide 13.

Furthermore, a curved portion 1 is provided at a portion adjacent to the base end side of the distal end portion 9.
4 is provided. This curved portion 14 is composed of, for example, a plurality of joint rings that can be bent to each other, and the above-mentioned operating portion 3
The bending portion 14 is configured to be able to be operated by a bending operation knob 3b provided at the bending portion 14.

Incidentally, the insertion section 2 is formed by being divided into a relatively hard front section 2a and a relatively soft rear section 2b. The front portion 2a and the rear portion 2b are connected via a connecting portion 15 as shown in FIG.

A protrusion 16 is provided on one side of the connecting portion 15 and protrudes diagonally with respect to the axis of the insertion portion, and a protective tube 17 is connected to this protrusion 16. . That is, a screw is threaded on the outer periphery of the protrusion 16, and a cap nut 17b is provided at the distal end of the protective tube 17, which is rotatable via a holding member 17a. The protective tip 17 is fixed to the connecting part 15 by screwing the protrusion 17b into the protruding part 16.

Further, another protective tube 18 is disposed within the front portion 2a of the insertion portion 2, and the proximal end side of this protective tube 18 is located within the protruding portion 16. The other end is connected via a connecting member 18a to four insertion holes 9a formed in the distal end 9 in parallel with the observation through-holes 12.

Furthermore, a rotational force transmission member 19 composed of a flexible shaft or the like is rotatably disposed inside the protective tube 18, and a fitting 19a is fixed to the distal end of the rotational force transmission member 19. is projected further forward of the distal end portion 9 through the insertion hole 9a. A screw 19b is formed on this protruding end, and a stopper 19c is formed between this end and the end surface of the distal end portion 9 on the distal end side. The metal fitting 19a is attached to the hole 21a formed through the center of the grindstone 21, which is an example of the four rotating parts.
When the nut 21b is screwed onto the screw 19b, the nut 21b, the stopper 19c and the C
The grindstone 21 is fixed.

The proximal end of the rotational force transmitting member 19 protrudes from the protrusion 16 of the connecting portion 15, and when another protective tube 17 is connected to the protrusion 16 via a cap nut 17b, this protective tube 1-pipe 17. Another rotational force transmission member 22 composed of a flexible shaft or the like is rotatably arranged within the connected protection 11-717, and the base end of the rotational force transmission member 19 of the front part 2a, A coupling member 23 of a coupling 23 is connected to the tip of the rotational force transmitting member 22 in the protective tube 17.
a and 23b are respectively provided, and the protective tube 1
7 is connected to the protrusion 16, this coupling 23
are now combined.

As shown in FIG. 4, the U end side of the rotational force transmitting member 22 inside the protective tube 17 protrudes from the protective duplex 17, and the protective portion N25 is fitted onto the outer periphery of this protruded portion. It is fixed at Ut 25 a.

Further, the base end side of the rotational force transmission member 22 is connected to a rotational drive device 26 disposed on the floor F. A drive motor 27 is included in this rotary drive device 26.
An output shaft 27a of this drive motor 27 projects to the outside of the housing through a hole 27b formed in the housing.

While this output shaft 27a is inserted into the hole 28a of the connecting member 28, this 31! The base @ side of the rotational force transmitting member 22, into which the protection member 25 is fitted, is inserted into another hole 28b formed at a portion opposite to the hole 28a of the installation member 28, and screws 29a are inserted into each hole 28b.

29b, these output shafts 27a
and the rotational force transmission member 22 are arranged in series.

When inspecting the inside of the compressor blade 4 using an endoscope system having such a configuration, the light guide cable 6 is connected to the light source device 7, and the rotating horn transmission member 22 in the protective tube 17 is connected to the connecting member 28. The distal end side of the protective tube 17 is connected to the protruding portion 16 of the connecting portion 15 via the cap nut 17b.
Connect to. In other words, the rotational force transmission member 22 and the rotational force transmission member 19 disposed inside the front part 2a of the insertion section 2.
They are connected via the connecting members 23a and 23b. Further, the grindstone 21 is fixed by installing a stone 21 and screwing the nut 21b into the grindstone 19ai, which is protruded through the insertion hole 9a of the tip portion 9.

In this state, the insertion part 2 is inserted into the compressor blade 4 through the holding hole 5a of the holder 5 fixed to the side surface of the compressor blade 4 and the insertion hole 4a of the side surface 4, and the fixing screw is inserted as necessary. 5b fixes the insertion section 2, and when the light source device 7 is turned on, the illumination light from the light source device N7 is transmitted to the distal end 9 via the light guide 8, and the illumination of the distal end 9 is The area to be inspected is irradiated with light through a light distribution lens 11a disposed in the through hole 11.

The illuminated image of the inspected area is formed by an objective lens 12a fixed to a transparent hole 12 in the distal end 9, and transmitted to the eyepiece 3a via an image guide 13. , it becomes possible to inspect the above-mentioned region to be inspected through this eyepiece portion 3a.

Furthermore, various parts within the compressor blade 4 are inspected by operating the bending operation knob 3b to bend the bending portion 14 and change the pointing direction of the objective lens 12a.

If a defect is found in the cutting edge of the compressor blade 4 in this state, the drive motor 2 of the rotary drive vii 126
7 is operated, and the output shaft 27 of this drive motor 27 starts rotating. Then, the rotation of the output shaft 27a is transmitted to the rotational force transmission member 22 via the connection member 28, and the rotation of the rotational force transmission member 22 is transmitted to the other rotational force transmission member 19 via the coupling 23. As a result, the grindstone 21 of the metal fitting 19a is rotated when the distal end portion 9 is attached to a portion protruding from the insertion hole 9a. And this whetstone 21
The shape of the defect is ground to a shape that does not cause stress concentration.

In this case, the curved portion 2 may be curved with a small radius of curvature depending on the position of the operator with respect to the engine blade 4. This curvature tends to occur particularly in the vicinity of the operating section 3. In this embodiment, the rear part 2b of the insertion part 2 provided on the operation part 3 side is the front part 2a of the insertion part 2.
Since it is formed to be more flexible, when working with the insertion section 2 curved, this rear part 2b is easily curved, improving the ease of work.

Further, the rotational force transmission member is not disposed in the curved rear portion 2b, and the rotational drive device V
Even if 126 is operated, if the rotational force transmission member is prevented from coming into contact with the protective tube, the rotation and vibration of this rotational force transmission member will have an adverse effect on the built-in components in the rear part 2b. Moreover, the rotational force of the rotational force transmitting member is not reduced due to the curvature of the rear portion 2b.

Further, the rotational force transmitting member 19.22 is extended from the middle of the insertion section 2 to the outside of the insertion section 2, and is connected to the rotation drive device 2126.
Since the rotational force transmission member is connected to the endoscope 1, the length of the rotational force transmission member is shorter compared to a structure in which the rotational force transmission member is extended to the outside of the endoscope 1 via the operating section 3, Loss due to twisting of the rotational force transmitting member is reduced, and workability is also improved.

Incidentally, in this embodiment, an example in which the grindstone 21 is used as an example of the rotational treatment member has been described, but this rotational treatment member is
It is also possible to use drill, tap, brush, etc. configurations. Further, the drive source installed in the rotary drive device 26 is not limited to the drive motor 27, but may also include, for example, an air turbine or the like.

Furthermore, in this embodiment, the can part 2b is made softer than the rear part 2b + the sprouting part 2a of the insertion part 2, so that the can part 2b can be easily bent. It is also possible to configure it to have U degrees. Even with such a configuration, the effect of the present invention does not change because the curvature occurs on the sides of the rear portion 2b.

Further, the device into which the insertion portion 2 is to be inserted is not limited to the compressor blade 14, but may be other devices such as a turbine or a smoke pipe of a boiler.

FIG. 5 is an overall diagram of an internal machining apparatus according to a second embodiment of the present invention. Incidentally, the same members and members having similar functions as those explained in the first embodiment are designated by the same reference numerals 8 and their explanations will be omitted.

In this embodiment, the front portion 2a of the insertion portion 2, except for the curved portion 14, is made of a hard member.

In such a configuration, only the rear aD2b is curved, and the front portion 2a where the rotational force transmission member 19 is disposed is not curved except for the curved portion 14, so that the rotation of the rotational force transmission member 19 is smoother. At the same time, there is an effect that the ease of inserting the insertion portion 2 into the compressor blade 14 is improved.

6 and 7 relate to a third actual flow example of the present invention, in which FIG. 6 is an overall view of the endoscope apparatus, and FIG. 7 is a side view of section C in FIG. 6.

In this embodiment, a rotary drive device 26 having a built-in drive motor 27 can be attached to the protrusion 16 of the connecting portion 15. That is, a cylindrical portion 26a is formed in the housing of the rotation drive device 2726, and a cap nut 17 is attached to this cylindrical portion 26a.
b is rotatably provided, and the rotary drive device E26 is fixed to the protrusion 16 via this cap nut 17b.

Further, a drive motor 27 is fixed within the housing, and an output shaft 27a of the drive motor 27 is disposed within the cylindrical portion 26a. A coupling member 23b of a coupling 28 is provided at the tip of the output shaft 27a, and the rotational force transmitting member 19 and the output shaft 27a are connected via the coupling 28. In addition, the drive motor 27
The power line 27c extends to the outside through a hole in the casing, and is connected to a power supply unit 30 disposed in Noroa F.

In such a configuration, the length of the rotational force transmitting member is short.
)C, the loss of rotational force due to twisting of the rotational force transmission member is further reduced, improving operability and grinding performance.
At the same time, it is possible to install the power supply unit 30 at a position apart from the rotary drive device 26.

[Effects of the Invention] As explained above, in the industrial family gift 11 necking according to the present invention, even if the insertion portion near the operating portion is curved with a small radius of curvature, the rotational force of the rotational force transmission member is In addition to preventing damage to the protective tip and built-in components of the rotational force transmission member, it is also possible to reduce losses due to twisting of the rotational force transmission member. have an effect.

[Brief explanation of the drawing]

1 to 4 relate to the first embodiment of the present invention, FIG. 1 is an overall view of the endoscope device, FIG. 2 is a plan view of part A in FIG. 1,
3 is a sectional view of the distal end, FIG. 4 is a top view of section B in FIG. 1, FIG. 5 is an overall view of the endoscope device according to the second embodiment of the present invention, and FIGS. FIG. 7 relates to a third embodiment of the present invention, FIG. 6 is an overall view of the endoscope apparatus, and FIG. 7 is a side view of section C in FIG. 6. 2...Insertion part 9...Tip part 19.22...Rotary force transmission member 21...Rotary treatment member 26...Rotary drive device Fig. 4 Fig. 7 Fig. 1, Indication of incident 2, Name of the invention 3. Name of address related to 11 amendments 4. Address of agent (amendment of procedures) (voluntary) August 6, 1990 Patent Application No. 299982 Industrial Endoscope Device

Claims (1)

[Claims] The distal end side of the rotational force transmission member housed in the insertion section protrudes from the distal end, and the rotational treatment member is attached to this protruding portion, while the proximal end side of the rotational force transmission member is inserted from the middle of the insertion section to the outside of the insertion section. What is claimed is: 1. An industrial endoscope device, characterized in that the extended portion is connected to a rotary drive device.