JPS60233611A - Fixing device for observation of endoscope - Google Patents

Abstract

PURPOSE:To perform secure inspection by providing the fixing device for observation to which a hook provided atop with a hook-shaped part for locking a body to be fixed in contact is fixed. CONSTITUTION:The endoscope has an observation optical system 6, light optical system 7, and hollow channel 7 into which a treating tool is inserted at the top of the insertion part 2. The shaft part 12 of the hook member 11 having the hook-shaped member 10 atop is inserted into the channel 8. This member 11 is formed of a close winding coil, etc., and made flexible so that its shaft part 12 is inserted into the channel 8 even when bent. Then, a tensile fixing means 13 is provided to the base side of the member 11. Namely, a chuck member 20 is moved toward the fixed part body 16 against the energizing force of the coil spring 21 to compress the spring 21 and the member 20 is rotated when a pin 23 reaches a lateral groove 18 to store the pin 23 in the lateral groove 18, so that the spring 21 is held compressed. Then, a clamping member 26 is rotated to decrease the internal diameter of a chuck 24, which is fixed in press contact with the shaft part 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an endoscope observation fixing device suitable for performing an internal inspection of, for example, a gas turbine engine using an endoscope.

[Technical Background of the Invention and Problems Therewith J In recent years, endoscopes have been widely used not only in the medical field but also in the industrial field.

When inspecting the inside of a gas turbine engine using the above endoscope, aim at the hook member that fixes the distal end of the endoscope insertion section inserted into the engine. An essential element is a guide tube that guides the turbine blades.

An endoscope using the above-mentioned hook member is disclosed in Japanese Patent Application Laid-Open No. 55-781.
As disclosed in Publication No. 27, by hooking the tip of the hook member on the blade, guiding the endoscope to the end of the blade, and fixing the endoscope and the proximal side of the hook member on the operating section side, This is to fix the endoscope and blade.

However, in this structure, the hook member and the endoscope are fixed to each other, but the tip of the hook member is mouth-shaped, and the blade is transverse to this mouth-shaped part, so the locking is difficult. This is not sufficient, and there is a drawback that if the endoscope is moved forward while being fixed with the hook member, the distal end side of the hook member easily comes off from the blade.

[Object of the Invention] The present invention has been made in view of the above-mentioned points, and when the endoscope is inserted into a gas turbine engine or the like for inspection, the endoscope can be reliably kept in a locked state and a desired region can be observed. An object of the present invention is to provide a fixing device for observation of an endoscope.

[Summary of the Invention] The present invention has a hook-shaped distal end that comes into close contact with an object to be fixed, and the distal end is attached to the proximal side of a hook member that is inserted through a channel of an endoscope and protrudes from an operating section. By providing a tension fixing means that pulls and fixes the side toward the proximal side, it is possible to maintain the locked state reliably and make it possible to observe it.

[Embodiments of the invention] Hereinafter, the present invention will be specifically described with reference to the drawings.

Figures 1 to 8 relate to one embodiment of the present invention, with Figure 1 showing one embodiment used in an endoscope, and Figure 2 showing an enlarged view of the distal end side of Figure 1. 3 shows the hook member forming one embodiment, FIG. 4 shows the tension fixing means attached to the proximal side of the hook member, and FIG. 5 shows the tension fixing means formed on the outer periphery of the fixing part main body in FIG. The sixth figure shows the shape of the groove.
The figure shows a cross section taken along the line A-A in FIG. 5, FIG. 7 shows a state in which the first embodiment is inserted into a gas turbine engine and inspected with an endoscope, and FIG. The distal end side of one embodiment is shown in an enlarged manner.

As shown in FIG. 1, an (industrial) endoscope 1 for inspecting the inside of a gas turbine engine, etc. includes a flexible and elongated insertion section 2 and a rear end side of the insertion section 2. It is composed of an operating section 3 having a large diameter or a large diameter, an eyepiece section 4 provided at the rear end of the operating section 3, and a light guide cable 5 extending from the side of the operating section 3.

The endoscope 1 has an observation optical system 6 and an illumination optical system 7 formed at the distal end of the insertion section 2, as shown in FIG.

The illumination optical system 7 is configured to emit illumination light (from a light source device, not shown) transmitted through the light guide cable 7 from its front end, and illuminate a range that can be observed by the observation optical system 6.

Furthermore, the insertion section 2 of the endoscope 1 is formed with a hollow channel 8 through which a treatment instrument can be inserted.Normally, the distal end side of the treatment instrument is inserted through the introduction port 9 on the side of the operation section 3. It can be inserted and protruded from the outlet of the channel 8. By the way, in the case of the hook member 11 having the scraped part 10 formed at the tip which cannot be inserted into the channel 8 as in the first embodiment, the base side of the shaft part 12 is inserted from the outlet side of the channel as shown in FIG. The base side thereof can be made to protrude from the insertion port 9 on the side of the operating part 3, and the protruding base side is covered with a tension fixing means 13 as shown in FIG. Adapted to constitute a fixation device.

The hook-shaped portion 10 has a shape that allows it to come into close contact with a fixed member to which the hook-shaped portion is hooked. The hook member formed by providing the hook-shaped part 10 at the tip of the shaft part 12 is made of a tightly wound coil or the like so that the shaft part 12 can be inserted into the channel 8 of the endoscope 1 even if it is bent. It is formed to have flexibility.

A tip for fixing a tightly wound coil is attached to the rear end of this shaft portion 12.

One embodiment of the fixing device, which is configured by providing the tension fixing means 13 on the base side of the hook member 110, is used when inspecting the inside of a gas turbine engine together with the endoscope 1 whose shaft portion 12 is inserted into the channel 8. The guide tube 14 is inserted into the guide tube 14 for guiding the blade to the target blade in the gas turbine engine.

By the way, the shaft part 12 is inserted into the channel 8 of the endoscope 1, and is mounted on the proximal base of the shaft part 12 that protrudes from the insertion port 9 of the operating part 3, and is unlockable and fixed by tension. The means has a structure shown in FIG. 4, for example.

That is, the fixing part main body 16, which has a substantially cylindrical shape and has a concentric hollow part through which the shaft part 12 can be inserted, has a vertical groove 17 along the longitudinal direction on its outer periphery as shown in FIG. Horizontal grooves 18, 18° 18 are formed along the sides. A hollow chuck member 20 has a cylindrical member 19 fitted on the inner periphery of the fixing part main body 16 and slidable in the longitudinal direction connected to the front end thereof, and a coil spring 21 is attached to the outer periphery of the cylindrical member 19. When the chuck member 20 is housed, a biasing force is exerted on the fixing portion main body 16 to press the chuck member 20 rearward.

The outer periphery of this coil spring 21 is covered with a cylindrical cover member 22, and the rear end side of this cover member 22 is covered with a chuck member 20.
It is fixed by screwing etc. to the front end of. A bottle (key) 23 is provided on the front end side of the cover member 22 and projects radially inward, and this bottle 23 is within the range regulated by the vertical groove 17 and the horizontal grooves 18, 18, and 18. can be moved.

Further, a chuck 24 is formed on the rear end side of the chuck member 20. The chuck 24 has a variable effective inner diameter and can press the shaft portion 12 into a gripping state or loosely fit the shaft portion 12. In other words, the rear end side of the chuck member 20 is tapered to have an outer diameter that becomes smaller toward the rear, and this tapered portion is provided with a notch 25 of an appropriate length in the longitudinal direction, and is pressed from the outer circumferential side. This makes it possible to reduce its effective inner diameter. As a means for varying this effective inner diameter, a tightening member 26 having a tapered inner circumference that fits into the tapered outer circumference of the chuck 24 is screwed onto the outer circumference of the chuck member 20. Depending on the direction of rotation, the inner diameter of the chuck 24 can be reduced to grip the shaft 12 or release the grip on the shaft 12.

A mouthpiece 27 that fits into the channel insertion port 9 of the endoscope 1 is connected to the front end side of the fixing part main body 16, and is fixed to a support member 28 on the outer periphery of this connection part. A guide member 30 is fixed to this support member 28 via a connecting rod 29, and the shaft portion 12 protruding rearward from the chuck 24 is passed through a through hole provided in this guide member 30. It is possible to prevent the shaft part 12 from being bent or to damage the shaft part 12 by being caught in the notch spring 25 of the chuck 24 when locking with the chuck 24.

By the way, the horizontal groove 18 formed on the outer periphery of the fixing part main body 16
, 18.18, hook member 11 (or shaft portion 12
) can be fixed under tension.

That is, the coil spring 21 compresses the chuck member 20, which is spaced backward from the fixing part body 16, against the bias of the coil spring 21, and the bottle 23 moves forward in the vertical groove 17. When the position of the horizontal groove 18 is reached, the chuck member 2o is rotated to store the bottle 23 in the horizontal groove 18. Thereafter, by rotating the tightening member 26, the effective inner diameter of the chuck 24 is reduced and the shaft portion 12 is fixed, and after this fixation, the chuck member 20 is rotated in the opposite direction to the above rotation to move the bottle 23 vertically into the Wii 17. Return to Then, the shaft portion 12 fixed by the chuck 24 of the chuck member 20 is fixed in a stretched state together with the chuck member 20 by the coil spring 21 . This shaft part 12
is pulled rearward, so that the base portion 27 is held in pressure contact with the channel insertion opening 9 of the inner gift 111, and
When the raked part 10 at the tip of the hook member 11 is in a locked state where it is hooked onto an object to be fixed, the raked part 1o is pulled so that the locked state can be maintained.

The three lateral grooves 18, 18, 18 are for fixing by varying the tensile force.

The operation of one embodiment configured in this manner will be described below.

When inspecting the inside of a gas turbine engine, the rear end side of the shaft portion 12 of the hook member 11 is inserted into the channel 8 of the endoscope 1, as shown in FIG. A tension fixing means 13 is provided on the rear end side of the shaft portion 12 to be taken out, and the endoscope 1 to which this embodiment is attached is inserted into the guide tube 14 and guided into the guide tube 14 as shown in FIG. Then, let the tip side protrude (towards the object to be fixed), and then move it inwards. [The hook-shaped portion 1 of the hook member 11 protrudes forward while the observation optical system 6 of 1 is being observed, and as shown in FIG.
Hook 0.

Next, the hook member 11 on which the scraped part 10 at the tip is hooked
The endoscope 1 (insertion section 2 thereof) is inserted along the shaft portion 12 of the endoscope 1. In this case, the hook-shaped portion 10 of the hook member 11 is the eighth
As shown in the enlarged figure, the tip of the endoscope 1 is pressed against the surface of the blade 31 because it is shaped to catch on the blade 31 and come into close contact with it. In this manner, the tip of the endoscope 1 is pressed against the surface of the blade 31 and is difficult to move, and the front end mouthpiece 27 is fitted into the insertion opening 9 of the operating section 3 of the endoscope 1. Hook member 1 with fixing means 13
The shaft portion 12 of No. 1 is fixed in the following manner.

That is, the chuck member 20 is moved toward the fixed part main body 16 against the biasing force of the coil spring 21 to compress the spring 21, and when the bottle 23 reaches the lateral position F+18, the chuck member 20 is rotated to store the bottle 23 in the horizontal groove 18 and keep the coil spring 21 in a compressed state. Thus, the tightening member 26 is rotated to reduce the inner diameter of the chuck 24 formed on the rear end side of the chuck member 20, so that the chuck 24 is brought into pressure contact with the shaft portion 12 and held in a fixed state. Thereafter, by rotating the chuck member 20 in the opposite direction and storing the bottle 23 in the vertical groove 17, the chuck member 20 is pressed backward by the compressed coil spring 21, and the chuck 24 The fixed shaft portion 12 is in a state where a tensile force is applied so that it is pulled rearward. Therefore, the hook-shaped portion 10 of the hook member 11 is also held in a state of being pulled rearward, which is the direction opposite to the direction required to release the hook.

Therefore, during observation using the endoscope 1 in this state, the hook-shaped portion 10 does not come off from the blade 31, and observation can be performed in a stable state without wobbling.

Moreover, even when it is necessary to move the endoscope 1 for observation, the hook-shaped portion 10 is in close contact with the endoscope 1, so that observation can be performed without being disengaged. In this case, if the endoscope 1 is to be moved slightly, the engagement between the hooked portion 10 and the blade 31 is sufficient, so it is sufficient to simply move the endoscope *i. If a larger movement is desired, this can be done by releasing the fixation of the tension fixing means 13. In addition, to release this fix,
The chuck member 20 is compressed to house the bottle 23 in the horizontal groove 18, the tightening member 26 is rotated and loosened, and then the bottle 23 is
What is necessary is to return it into the vertical groove 17.

The present invention is applicable not only to inspection inside a gas turbine engine, but also when inspecting (observing) the inside of a lumen, etc.
It is sufficient to set the scratch-shaped part in a shape that matches the shape of the member that can be used as an object to be fixed in the cavity, and a round or square shape can be similarly applied. Furthermore, the scraped portion 10 is not limited to the shape of a bent wire, but may be a bent plate. Furthermore, instead of one piece, a plurality of pieces may be formed.

Note that the means for tensioning and fixing the hook member 11 is not limited to that shown in FIG. 4, and may have a different structure. Further, the number of lateral grooves is not limited to three, but may be a different number, or may be formed diagonally with a recess formed in the middle. Also, this horizontal groove 18
A means for holding the coil spring 21 in a compressed state is not essential.

[Effects of the Invention] As described above, according to the present invention, a hook member is formed by providing a hook-shaped portion at its tip that tightly fits and locks on an object to be fixed,
A fixing device for observation is provided by providing means for fixing by pulling on the proximal side protruding from the channel (insertion) port of the operation part, so when inspecting the inside of a gas turbine engine, etc., the endoscope can be used for observation. The desired area can be inspected in a state where it is easy to observe without it coming off. Furthermore, since the endoscope does not wobble during observation, reliable examination can be performed without tiring the eyes. It can be realized at even lower cost.

[Brief explanation of the drawing]

1 to 8 relate to one embodiment of the present invention, in which FIG. 1 is a perspective view showing one embodiment in a state where it is used in an endoscope, and FIG.
The figure is an enlarged perspective view of the tip side of Figure 1, and Figure 3 is 1.
A side view showing the hook member forming the embodiment, FIG.
A vertical cross-sectional view showing a tension fixing means for attaching to the proximal side of the hook member for tension fixing, FIG.
7 is an explanatory diagram showing the state of use when an endoscope is inserted into the gas turbine engine for inspection, and FIG. 8 is a cross-sectional view taken along the line A-A in the figure. FIG. 2 is an explanatory diagram showing an enlarged portion. DESCRIPTION OF SYMBOLS 1... Endoscope 11 2... Insertion part 3... Operation part 6... Observation optical system 8... Channel 9... Insertion port 10... Hook-shaped part 11... Hook member 12...
Shaft portion, 13... Tension fixing means 14... Guide tube 16... Fixing part body 17... Vertical groove 18.
...Horizontal groove 20...Chuck member 21...Coil spring 23...
...Bin 24...Chuck 26...Tightening member 31...Blade Fig. 5 Fig. 7 Fig. 6 Fig. 8

Claims (4)

[Claims] (1) A hook member with a scratched part formed at the tip of a flexible shaft that can be inserted into a channel of an endoscope, and a rear end side of the hook member that protrudes from the operating section of the endoscope. 1. A fixing device for observation of an endoscope, comprising a tension fixing means for fixing the endoscope by applying a tensile force. (2) The endoscope observation fixing device according to claim 1, wherein the hook-shaped portion has a shape that comes into close contact with the object to be fixed. (3) The endoscope observation fixing device according to claim 1, wherein the tension fixing means includes a tensioning spring and a fixing chuck. (4) The endoscope according to claim 1, wherein the tension fixing means has a locking means using a pin and a groove for holding and fixing the spring in a compressed state. Fixation device for observation.