JPH09120032A - Industrial endoscopic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device wherein an entire rotation treating member including a grinding wheel and a shaft is easily changed without falling off of parts. SOLUTION: In a treating tool main body, a tip member 62 freely bendable at a hinge part 61 is provided on the tip side of a guiding tube 12, a rotation treating member 70 is inserted through an attaching hole 68 communicated with the guiding tube 12 side into the tip member 62 and its tip side is freely rotatable against the tip member 62 via bearings 71 and 72 having a flange part 78. In the tip member 62, a pulling out preventing groove 81 orthogonal to the axial direction of a shaft part 75 and intersecting the attaching hole 68 is formed in a tip side adjacent to the bearing 72 and a pulling out stopper 82 is housed therein and retained by the energization of a leaf spring so as to prevent the movement of the bearing 72 side in the axial direction. This coming-off stopper 82 is supported by a pulling out preventing shaft so as to be rotatable in the coming-off preventing groove 81 and the rotation treating member 70 is inserted/pulled out by rotating the coming-off stopper 82 so as to release the engagement.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an industrial endoscope apparatus for performing a treatment such as grinding with a rotary treatment member while observing with an endoscope.

[0002]

2. Description of the Related Art By inserting the above-mentioned industrial endoscope inside a jet engine, for example, it is possible to determine whether or not the cutting edge of a turbine blade is chipped. And, if damage such as chipping of the blade of the turbine blade is found by inspection with this endoscope, even if the damaged part is small, if left as it is, stress will be applied to the damaged part. As a result of the increased concentration, the damage becomes progressively larger and the entire turbine blade must be replaced.

For this reason, conventionally, when a damage to the extent that the entire replacement is not required is found, the engine is disassembled and the damaged portion is ground. However, if the engine was disassembled and the grinding treatment was performed every time a small damaged portion was found, there was a problem that the repair would take too long.

Therefore, it is possible to attach a shaft provided with a grindstone for grinding a damaged portion of a turbine blade to the tip of the endoscope so that the grinding treatment can be performed while observing with the endoscope. It is disclosed in Japanese Patent Laid-Open No. 4-102816.

[0005]

[Problems to be Solved by the Invention]
In the configuration of Japanese Patent Publication No. 6, the rotary treatment unit attached to the distal end portion of the insertion portion 8 is fixed using screws. In this case, the screw may be loosened due to vibration during grinding, and the rotation treatment unit may come off from the tip portion.

Further, if the screw is worn or deformed, it may be difficult to attach or detach the rotation treatment unit, or it may become impossible to attach or detach the rotation treatment unit.

The present invention has been made in view of the above points, and it is an object of the present invention to provide an industrial endoscopic device in which the entire rotating treatment member including a grindstone and a shaft can be easily replaced without fear of parts falling off. To aim.

[0008]

[Problems to be Solved by the Invention] Industrial endoscopy provided with an observation optical system and an illumination optical system, and equipped with a bendable endoscope and a guide tube through which a rotational force transmitting means for transmitting a rotational force is inserted. In the mirror device, a tip member flexibly supported on the tip side of the guide tube, an opening provided in the tip member and communicating with the inside of the guide tube, and an insertable / removable member with respect to the opening, A rotation treatment member that is connected to the transmission means, is rotatably supported by the bearing means, and performs a treatment such as grinding on a target member by rotation, and the axial direction so that the bearing means does not move in the axial direction of rotation. A hooking portion for restricting the movement to the hook by a hooking portion, and an interfering means having a releasing means capable of releasing the hooking by the hooking portion.

The rotation treatment member, which is removably attached to the opening provided on the distal end side of the guide tube of the industrial endoscope apparatus, is restricted in its axial movement by the bearing means of the bearing means. It is rotatably supported in this state, and does not fall off from the tip member toward the tip of the opening even if it is freely inserted and removed.

On the other hand, if the releasing means releases the engagement of the rotation treatment member with the bearing means, the rotation treatment member can be removed from the opening of the tip member.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) A first embodiment of the present invention will be described with reference to FIGS. The industrial endoscope apparatus according to the first embodiment of the present invention shown in FIG.
(Hereinafter simply referred to as an endoscope) 3, a light source device 8 for supplying illumination light to the endoscope 3, a CCD camera 10 as a TV camera connected to the endoscope 3, and the CCD camera 10.
A monitor 11 for displaying the video signal of the above, and a mounting means for detachably mounting the endoscope 3, and a treatment tool main body 1 for performing grinding or the like with a rotating treatment member, and a motor 5 provided in the treatment tool main body 1. It is composed of a motor driving device 111 for driving.

The endoscope 3 has an elongated insertion portion 6 which is bendable and flexible (flexible), an operation portion 9 formed at the rear end of the insertion portion 6, and extended from the operation portion 9. A CC having a light guide cable 7 and a CCD (abbreviation of charge-coupled device) as a solid-state image sensor inside the C mount 33.
The D camera 10 is detachably attached. An observation optical system and an illumination optical system are provided on the distal end constituent member 102 (see FIG. 9) formed at the distal end of the insertion portion 6.

A light guide fiber bundle (hereinafter also referred to as LG) as an illuminating light transmitting means for transmitting illuminating light is inserted into the light guide cable 7, and the light guide connector 7a at the end of the light guide cable 7 is a light source. It can be detachably connected to the device 8. When the light guide connector 7a is connected, the illumination light is supplied from the lamp 8a in the light source device 8 to the end surface of the LG.

This illuminating light is transmitted by the light guide cable 7, the operating portion 9, and the LG inserted through the insertion portion 6,
It is emitted forward from the front end surface of the LG fixed to the illumination window,
An illumination optical system for illuminating an object side such as the turbine blade 18 shown in FIG. 1 is formed.

An objective lens forming an observation optical system is attached to the formed observation window adjacent to the illumination window, and forms an optical image of the illuminated object at an image forming position. At this image forming position, the tip end face of an image guide fiber bundle (also referred to as IG) as an optical image transmitting means is arranged, and this optical image is transmitted to the end face on the operating portion 9 side by IG. The endoscope 3 employed in the present embodiment is one in which an illumination window and an observation window are concentrically formed, as shown in FIG. 14, for example.

When the CCD camera 10 is detachably attached to the C mount 33 of the operation section 9, an optical image is formed on the CCD by the imaging lens or the imaging lens in the endoscope 3. The CCD camera 10 has a built-in video processing circuit for generating a video signal, generates a video signal from a signal photoelectrically converted by the CCD, outputs the video signal to the monitor 11 via a cable, and connects it to the CCD with an imaging lens. The image of the imaged IG end surface is displayed on the display surface of the monitor 11. The CCD camera 10
When the video processing circuit is not built in, the video signal is output to the monitor 11 via the external video processing circuit.

The insertion portion 6 of the endoscope 3 is removably inserted into the treatment instrument body 1. The treatment instrument main body 1 is provided with an elongated guide tube 12 through which the insertion portion 6 of the endoscope 3 and the flexible shaft 58 of the rotation treatment member 70 are inserted, and is provided on the distal end side of the guide tube 12 so as to be bendable. Tip member 62
And a treatment operation portion 36 formed at the rear end of the guide tube 12.

The guide tube 12 includes a hard outer tube 27 and the outer tube 2.
7 has a hard inner tube 28 slidably accommodated therein, and the tip member 62 side is freely rotatable at the tip of a connecting member 59 connected to the tip of the inner tube 28 and the rear end portion of the tip member 62. A bent portion (hinge portion) 61 is provided to support (see FIG. 5).

The hard guide tube 12 can be inserted into, for example, the inspection hole 17 of the jet engine as shown in FIG. 1, and the tip member 6 is bent by bending the tip member 6 side.
A turbine blade 1 as an object to be treated, which is a rotary grindstone 16 protruding from an opening 2 (a mounting hole in a specific example).
8 can be opposed.

A stay (support) 2 is extended rearward on the treatment operating portion 36 of the treatment instrument main body 1, and the endoscope 3 is detachably attached by a mounting screw 4 provided at the rear end of the stay 2. I am trying to install it.

A motor 5 is detachably attached to the rear end of the treatment operating portion 36 of the treatment instrument main body 1 by screwing, and the motor 5 is a motor drive for supplying rotational power to the motor 5 via a cable. It is connected to the device 111 and can be freely rotated and stopped by a switch (not shown) on the hand side.

Further, the treatment operation portion 36 of the treatment instrument body 1 is provided with a lever 13 forming a bending operation portion for performing an operation of bending the distal end member 62, and by performing an operation of inclining the lever 13, a pulley is formed. By rotating the wire 14 and winding the wire 15, as shown in FIG.
2, the tip member 62 can be bent to a bending angle of 90 °, for example.

As shown in FIG. 5, the rotation treatment member 70 is connected to the base end of a shaft portion 75 provided with a spherical portion 76 at the tip of a flexible shaft 58 for transmitting a rotational force.
Diamond powder is adhered to the spherical surface of No. 3, and forms a rotary grindstone 16 as a grinding member that grinds an object in contact with the spherical unit 76 by rotation. The rotary grindstone 16 is detachable so that it can be integrally replaced with the flexible shaft 58.

The flexible shaft 58 is inserted in a flexible tightly wound coil 44 in a freely loosely fitted state, and its distal end is provided on the distal end member 62 together with the proximal end of the shaft portion 75. This shaft portion 75 is inserted through a mounting hole 68 (as an opening communicating with the inside of the guide tube 12) from its tip end opening, and by a bearing means provided in a shaft portion 75 housed near the tip of this mounting hole 68, this shaft portion 75 The base end of is rotatably supported.

The flexible shaft 58 inserted through the coil 44 is inserted through the shaft guide 42 inserted through the inner tube 28, and the rear end side thereof is a coil of the main body 22 of the treatment operating portion 36 as shown in FIG. The rear end of the coil 44 is fixed by the receiver 55, and the connecting shaft 56 and the motor joint member 5
0, connected to the rotary shaft (output shaft) of the motor 5 via the motor connecting member 45.

As shown in FIG. 5, the distal end member 62 on the distal end side adjacent to the bearing means for rotatably supporting the shaft portion 75 of the rotation treatment member 70 has a lateral direction orthogonal to the axial direction of the shaft portion 75. A retaining groove 81 is provided in the inside of the retaining groove 81, and a retaining member 82 is housed in the retaining groove 81 so that the retaining member 82 is substantially fitted therein. As shown in FIG. Shaft portion 75 side, that is, the retaining groove 8
The bearing means is urged toward the bottom side of the shaft 1 to restrict the axial movement of the shaft portion 75.

When the leaf spring 89 is urged, the retainer 82 contacts the bottom portion 86 of the retainer groove 81 as shown in FIG. 6, and in this state, the retainer 82 catches on the cover 74 of the bearing means. The shaft portion 75 of the rotation treatment member 70 is reliably regulated (prevented) from moving in the axial direction.

Further, as shown in FIG. 7, the retaining member 82 is supported by a retaining shaft 83 so as to be rotatable in the retaining groove 81 by a slight angle in the circumferential direction, and is retained against the biasing force of the leaf spring 89. By rotating the stopper 82 in the clockwise direction, the catch of the bearing means by the stopper 82 can be released.

In other words, in this embodiment, the bearing means is prevented from coming off in the axial direction by the catch of the retainer 82, and the catch is securely held by the biasing force of the leaf spring 89. Retainer for removal 8
It is characterized in that an interfering means having a releasing means for releasing the hook 2 is provided. Hereinafter, the present embodiment will be described more specifically with reference to the drawings.

Hereinafter, the treatment instrument main body 1 will be described in detail with reference to FIGS. 2 (A) and 2 (B). FIG. 2A is a vertical cross-sectional view showing the configuration of the treatment instrument body 1, and FIG. 2B is a side view showing a connecting portion of the wire 15.

A pulley 14 is fixed to a shaft 19 of the treatment instrument body 1 with a screw. The shaft 19 is rotatably supported by a shaft support member 20. At one end of the shaft 19, the lever 1
3 are connected.

The proximal end (rear end) of the wire 15 is fixed to the pulley 14 with a screw 21.

The shaft support member 20 is fixed to the main body 22. A rear end of a cylindrical grip portion 23 for an operator to grip is fitted into a front end portion of the main body 22, and is fixed from the outer periphery by a screw (not shown). Grip part 23
Two grooves 24 are symmetrically provided on the tip end side so as to penetrate therethrough. (The width (not shown) of the groove 24 is slightly wider than the outer diameter of the traction shaft 25, which will be described later. There is a slight gap.) The outer tube receiving member 26 is provided on the tip side of the grip portion 23.
Is inserted and is fixed from the outer periphery by screws (not shown).

An outer pipe 27 constituting the guide pipe 12 having a double structure is fitted into the inner hole of the outer pipe receiving member 26 and fixed by adhesion. The inner diameters of the outer pipe receiving member 26 and the outer pipe 27 are the same.

Inside the outer tube 27, an inner tube 28 (the outer tube 2
7 is arranged so as to be movable back and forth in the axial direction). The inner pipe 28 is also movable back and forth with respect to the outer pipe receiving member 26. The rear end portion of the inner pipe 27 is fitted into the inner pipe receiving member 29 and fixed to the inner pipe receiving member 29 by adhesion. The outer diameter of the inner pipe receiving member 29 is equal to the inner diameter of the grip portion 23, and the inner pipe receiving member 29 is configured to be capable of advancing and retreating on the inner peripheral surface of the grip portion 23, that is, slidable in the axial direction.

A female screw 30 is provided on the outer peripheral portion of the inner pipe receiving member 29.
1 is provided, and a restriction pin 31 is attached to the female screw 30 by screwing. The front end side (in the radial outer direction) of the restriction pin 31 is loosely fitted in a restriction groove 23 a provided on the rear end side of the grip 23. Regulation pin 31
Hits the right groove wall of the regulation groove 23a in the figure.

A coil-shaped first spring 34 having a function of a compression spring is loosely fitted in a recess 29a provided concentrically at the base end of the inner pipe receiving member 29 so as to be shorter than its natural length. One end of the first spring 34 abuts against the wall surface inside the recess 29a of the inner pipe receiving member 29.

The other end side of the first spring 34 is loosely fitted to the small diameter portion 35a of the guide receiving member 35 arranged between the rear end side of the inner pipe receiving member 29 and the rear end of the main body 22, The other end of the first spring 34 abuts on the stepped portion at the rear portion of the guide receiving member 35, so that the first spring 34 axially separates both the guide receiving member 35 and the inner pipe receiving member 29 from each other. Gives a bias.

Further, the inner pipe receiving member 29 has a stepwise cutout on the outer peripheral surface on the front end side to form a small diameter portion, and a compression spring having a coil shape having an inner diameter slightly larger than the outer diameter of the small diameter portion. The second spring 37, which functions as a member, is loosely fitted, one end of the second spring 37 abuts on the step surface, and the second spring 37
The other end side is loosely fitted to the slider 38 arranged on the front end side of the inner pipe receiving member 29, and hits the stepped surface thereof. The second spring 37 applies a biasing force to both the inner tube receiving member 29 and the slider 38 so as to separate them from each other in the axial direction.

As described above, the two springs 34 and 37 are housed in the grip portion 23 with an axial gap, and the guide receiving member 35, the inner pipe receiving member 29 and the slider 38 are urged in the axial direction. There is. Here, the spring constant of the first spring 34 is set to be smaller than the spring constant of the second spring 37.

The inner diameter of the slider 38 is equal to the inner tube receiving member 29.
It is larger than the outer diameter (of the fixed part that fixes the inner pipe 28 in), has a gap without contact, and is movable in the axial direction. Further, the outer diameter of the slider 38 can slide back and forth with respect to the inner diameter portion of the grip 23. Female screws 38a are provided on the slider 38 at two symmetrical positions.

The pulling shaft 25 is fixed to each female screw 38a by screwing. Each pulling shaft 25 passes through the groove 24 of the grip portion 23 and projects to the outer diameter side of the grip portion 23. Each pulling shaft 25 is attached to the wire joining member 40. Specifically, as shown in FIG. 2B, the pulling shaft 25 is attached to the wire joining member 40 by interposing an E-shaped retaining ring 41 so that the pulling shaft 25 does not come off from the wire joining member 40. . The shape of the wire joining member 40 is shown in FIG.

Further, the wire splicing member 40 has a wire 1
The end portion of 5 is fixed by soldering (in FIG. 2, the solder fixing portion by soldering is shown by reference numeral 39). The wire 15 is attached in a slightly loosened state.

Inside the inner tube 28, a pipe-shaped shaft guide 42 and a scope guide 43 are inserted. The shaft guide 42 and the scope guide 43 are the inner tube 2
On the rear side of 8, a hollow portion of the inner pipe receiving member 29 and a hollow portion of the guide member 35 are inserted. The scope guide 42 is not fixed to the hollow portions of the guide receiving member 35 and the inner pipe receiving member 29, but is inserted so as to be loosely fitted.

A tightly wound coil 4 is mounted on the shaft guide 42.
4 is inserted freely. The flexible shaft 5 for transmitting the rotational force to the rotary grindstone 16 is provided to the coil 44.
8 (see FIG. 5) is rotatably inserted. On the other hand, the insertion portion 6 of the endoscope 3 introduced into the treatment instrument body 1 in FIG. 1 is removably inserted into the scope guide 43.

Next, referring to FIGS. 3 and 4, the treatment instrument main body 1
The structure of the hand side part of will be described. 3 is a vertical cross-sectional view for explaining a portion connecting the motor 5 and the flexible shaft 58, and FIG. 4 is a horizontal cross-sectional view showing the shape of the motor joint member 50.

A motor connecting member 45 is fitted into the rear end of the main body 22, and the motor connecting member 45 is fitted with screws 46 from the circumferential direction.
Are fixed to the main body 22. On the inner peripheral surface of the motor connecting member 45, a first bearing 48 and a second bearing 49 are arranged front and rear, and a motor joint member 50 inside thereof is rotatably attached.

A cylindrical spacer 51 is arranged between the first bearing 48 and the second bearing 49 to form the first bearing 48.
And the distance between the second bearing 49 is determined. A ring-shaped bearing fixing member 52 screwed into a male screw 50a provided on the outer peripheral surface of the motor joint member 50 at a position adjacent to the first bearing 48 includes a first bearing 48, a spacer 51, and a second bearing 49. It is fixed to the motor joint member 50.

A retaining ring 54 is screwed to the female screw 53 provided on the inner peripheral surface of the front end of the motor connecting member 45. The retaining ring 54 secures the motor connecting member 50, the second bearing 49, the spacer 51, and the first bearing 48 to the motor connecting member 45.

A coil receiving member 55 is fitted in the main body 22 adjacent to the front end of the motor connecting member 45 and is fixed by a screw 57 from the circumferential direction. Inside the coil receiving member 55, the front end side of the connecting shaft 56 is introduced with a gap. The rear end of the connecting shaft 56 is the motor joint member 50.
It is installed in the recess of. The cross-sectional shape of the rear end of the connecting shaft 56 is a square cross-sectional shape as shown in FIG. 4, and correspondingly the shape of the recess of the motor joint member 50 is also the same. Therefore, when the motor joint member 50 rotates, the connecting shaft 56 also surely rotates.

The base end portion (rear end portion) of the motor joint member 50 is machined into a shape (for example, a deep cross groove) to be combined with an output shaft (not shown) of the motor 5. When the motor 5 is screwed into the male screw 47 on the outer peripheral surface of the rear end of the motor connecting member 45, the output shaft of the motor 5 is fitted in the cross deep groove.

The base end side of the flexible shaft 58 is fitted into the front end of the connecting shaft 56 and fixed by soldering or the like. The end of the flexible shaft 58 is previously hardened with silver solder having a higher melting temperature than solder. The end of the coil 44 is loosely fitted in the coil receiving member 55.

Details of the structure of the guide tube 12 and the distal end portion will be described with reference to FIGS. 5 is a vertical cross-sectional view showing the details of the distal end portion (rotation treatment member) in a straight state and a bent state, and FIG. 6 is a cross-sectional view showing the relationship between the retaining member, the endoscope 3, and the rotation treatment member. 7 is a plan view of the tip side of FIGS. 5 and 8, FIG. 8 is a longitudinal sectional view showing details of the tip portion (leaf spring fixing structure), and FIG. 9 is a longitudinal section showing details of the tip portion (tip of the endoscope 3). It is a figure.

As shown in FIG. 5 (A), a connecting member 59 is fitted at the tip of the inner pipe 28 that is slidable on the outer pipe 27, and is fixed from the circumferential direction by screws (not shown).
The connecting member 59 is also movable back and forth with respect to the outer tube 27. The distal end portion of the outer pipe 27 that is fitted onto the inner pipe 28 is obliquely cut away at an angle of 45 ° to form a first inclined surface 60.

A tip member 62 is connected by a tip shaft 63 to a fork portion 61 provided at the tip of the connecting member 59, and the tip member 62 allows the tip member 62 to rotate with respect to the connecting member 59 side. The shape of the hinge portion 61 is shown in FIG.
reference.

The connecting member 59 has a second inclined surface 6 of 45 °.
4 is provided (a direction perpendicular to the outer tube 27). When the tip member 62 and the connecting member 59 are linear, the two inclined surfaces 60 and 64 are in a substantially surface contact state or a state close thereto.

In the connecting member 59, the first groove 65 is dug slightly wider than the width of the coil 44 from the outer peripheral side to the intermediate portion (provided not to be directed toward the center but parallel to the axis). Exist). At the rear end of the connecting member 59, a first hole 66 is provided in the axial direction. The tip of the shaft guide 42 is fitted into the first hole 66 and fixed by adhesion. The reduced diameter portion 67 of the first hole 66 penetrates the first groove 65.

The distal end member 62 is provided with a mounting hole 68 as an opening for inserting and mounting the rotation treatment member 70 from the distal end side. The diameter of the mounting hole 68 is once reduced on the hand side (rear end side), and the diameter is reduced near the third inclined surface 69 at the rear end.
The shape of the hole is changed to an elliptical shape toward the elbow 61. The third inclined surface 69 is an inclined surface having an angle of 90 ° with the first inclined surface 60 when the tip member 62 is in a straight line shape which is not bent.

The base end side of the rotation treatment member 70 is inserted into the mounting hole 68 from the front end opening of the mounting hole 68, or mounted.
It can be inserted and removed so that it can be removed and removed. That is, the mounting hole 68, the first groove 66, the reduced diameter portion 6
7. The rotation treatment member 70 is inserted through the shaft guide 42 and is detachably attached as described later.

As shown in FIG. 5, the rotary treatment member 70 includes a rotary grindstone 16 provided at its tip, a first bearing 71 and a second bearing 72 supporting the rotary grindstone 16, and a flexible shaft 58 for transmitting a rotational force. A housing member 73 for housing the bearings 71, 72, and the housing member 73.
And a coil 74 that is fixed to the housing member 73 and protects the flexible shaft 58.
And a connecting shaft 56 (see FIG. 3) connected to the rear end of the flexible shaft 58.

The rotary grindstone 16 comprises a shaft portion 75 and a spherical portion 76. Only the spherical portion 76 is covered with diamond powder. A shaft mounting hole 77 is concentrically provided at the rear end of the shaft portion 75. A large-diameter flange portion 78 is provided at an intermediate portion of the shaft portion 75, and is engaged with the retaining portion 82 so as to be hooked, so that the detachment in the axial direction can be regulated.

The flange portion 78 has a shaft mounting hole 77.
There is one hole 79 passing through. In the shaft mounting hole 77, a flexible shaft 58 in which a plurality of thin metal wires are twisted together and the ends thereof are fixed with silver brazing so as not to be scattered
Are fitted and fixed by soldering in the holes 79.

The shaft portion 75 is supported by a bearing member made of oil-impregnated metal. That is, the rear end side of the flange portion 78 is supported by the first cylindrical bearing 71, and the front end side of the flange portion 78 is divided into two cylinders in the axial direction.
Two bearings 72 are used for supporting.

The first and second bearings 71 and 72 are press fitted into the housing member 73. The shaft portion 75 is rotatable with respect to the bearings 71 and 72 even after press fitting.

The outer diameter of the flange portion 78 is slightly smaller than the outer diameter of the first and second bearings 71 and 72.

The coil 44 is fixed to the inner diameter portion of the housing member 73 on the proximal side by soldering, and the flexible shaft 58 is rotatably loosely fitted inside the flexible shaft 58 inside.

A cover 74 is fitted on the housing member 73. A tip reduced diameter portion 80 is provided at the tip (front end) of the cover 74, and the inner diameter thereof is larger than the outer diameter of the flange portion 78 and is eccentric in the circumferential direction. When the cover 74 and the housing member 73 are combined with each other, the two second bearings 72 abut on the end face formed by the tip reduced diameter portion 80. In the state where the bearings 71, 72 and the housing member 73 are not provided, the flange portion 78 of the rotary grindstone 16 can be inserted into the tip reduced diameter portion 80.

FIG. 5B shows a state in which the lever 13 is operated to bend the tip member 62 side. Next, a structure in which the rotation treatment member 70 is attached to the tip member will be described.

As shown in FIG. 5, the tip member 62 is provided with a retaining groove 81. The retaining groove 81 intersects with the mounting hole 68. That is, the mounting hole 68 is formed in the axial direction of the tip member 62, and a retaining groove 81 is provided in the lateral direction orthogonal to this axial direction, and this groove 81 communicates with the mounting hole 68. The proximal surface of the retaining groove 81 and the distal end surface of the cover 74 are substantially flush with each other.
Although it may be slightly recessed, at least the front end surface of the cover 74 does not travel into the groove 81 (for preventing the stopper 82 from protruding radially inward).

The retaining groove 82 is attached to the retaining groove 81 with a slight clearance. This retainer 82
The tip side of the inner side of the radius of the contact with the tip portion of the cover 74 described above, and the bearing 7 of the cover 74 and the housing member 73
1, 72 and the like are prevented from moving toward the tip end side in the axial direction and coming off.

The retainer 82 is rotatably supported by a retainer shaft 83 as shown in FIG. An E-shaped retaining ring 84 is attached to the retaining shaft 83. The E-shaped retaining ring 84 is attached to the retaining shaft 83 so as to be inserted into the slit 85 provided in the retaining mechanism 82.

As shown in FIG. 6, the retainer 82 is a leaf spring 8.
9, the retaining groove 81 provided in the tip member 62.
In the state of being urged toward the bottom portion 86 side of the
The stopper 82 does not rotate counterclockwise because it contacts the bottom portion 86 of the stopper groove 81. On the other hand, it can rotate in the clockwise direction until the apex 87 on the right side of the retainer 82 comes into contact with the bottom 86.

The retaining portion 82 is the bottom portion 86 of the retaining groove 81.
When the retainer 82 rotates in the clockwise direction, the retainer 82 and the mounting hole 68 do not interfere with each other. In the state where the retainer 82 and the mounting hole 68 interfere with each other, the retainer 82 and the cover 74 interfere with each other.

A free end of a leaf spring 89 made of a metal elastic member extending in the axial direction is in contact with a notch portion 88 provided at the center of the retaining member 82. Then, the retainer 82 is pressed against the bottom portion 86 with a sufficient biasing force, and in this state, the retainer 82 is caught by the bearing means of the rotation treatment member 70 and acts as a retainer as shown in FIG. I have to.

Then, a rotation canceling member 70 is formed by forming a release mechanism capable of releasing the catch by rotating the retainer 82 clockwise around the retainer shaft 83 against the bias of the leaf spring 89. Is designed to be attachable and detachable from the attachment hole 68.

The tip member 62 is provided with a leaf spring groove 90. The curved portion 82a of the retaining member 82 has substantially the same size as the outer diameter of the tip member 62. As shown in FIG. 7, the depth of the leaf spring groove 90 reaches the intermediate portion in the circumferential direction of the tip member 62. The leaf spring groove 90 intersects with the retaining groove 81. A leaf spring 89 is housed in the leaf spring groove 90.

The wire groove 91 is deeper than the leaf spring groove 90 by one step.
Is provided. The tip member 62 and the retainer 82 are
Each of the holes 92 is provided in the axial direction. A retaining shaft 83 is fitted in the hole 92. A slit 85 is provided in the middle portion of the thickness of the retaining member 82 and intersects with the hole 92. Then, as described above, the E-shaped retaining ring 84
Is inserted into the slit 85 and is attached to a reduced diameter portion having a small outer diameter in the middle portion of the retaining shaft 83. The leaf spring groove 90 has an internal thread portion 93 (internal thread 93
Remains only partially), there is a stop screw 94 there.
Is screwed.

A through hole 95 is formed in the stopper screw 94 (see FIG. 8).
Has been opened. In the through hole 95, the retaining wire 9
6 is inserted. A large diameter portion 97 is formed at the tip of the retaining wire 96 by crimping. Set screw 94
The large-diameter portion 97 of the retaining wire 96 is housed in the inside of the.

The hinge portion 61 has the following shape. With the two ears 98 on the side of the tip member 62, the connecting member 6
It sandwiches the tip of 2. In the ear portion 98, the tip end member 62 is rotatable by a tip end shaft 63 that penetrates and supports the tip end of the connection member 62. One end of the tip shaft 63 has a large-diameter portion 63a (outer diameter is larger than the fitted portion), and the other end has E
A mold retaining ring 99 is attached.

As shown in FIG. 8, the retaining wire 96 is inserted into the through hole 95 of the retaining screw 94. Although not shown, the rear end of the retaining wire 96 passes through the inside of the guide tube 12 and is connected to a tension spring. Retaining wire 9
6 is housed in the wire groove 91. The tension spring is fixed to the guide receiving member 35 described above. Since the tension spring is attached in a state in which it is stretched more than usual, the restoring force of the tension spring acts on the retaining screw 94 along the retaining wire 96. The spring constant of the tension spring is much smaller than that of the first and second springs 34 and 37.

The tip of the stopper screw 94 is incorporated in the wire groove 91 (the outer diameter of the tip is smaller than the width of the wire groove 91). Further, the tip end portion is inserted into an insertion hole 89 a provided in the base end portion of the leaf spring 89. The intermediate portion 94a of the stop screw 94 having a larger outer diameter than the tip portion is the leaf spring 8
9 is pressed against and fixed to (the tip member 62 of) the bottom portion 86 of the leaf spring groove 90. The free end of the leaf spring 89 is the leaf spring 8
The stoppers 82 are in contact with each other so that the stopper 9 can be removed. The retainer 82 is pressed against the bottom portion 86 by the force generated by the elastic deformation.

As shown in FIG. 9, the distal end member 62 is provided with a second mounting hole 68 for the rotation treatment member 70 (as an opening for inserting and fixing the endoscope 3 in its axial direction).
Mounting holes 100 are provided in the axial direction. This second
The retaining groove 81 is also in contact with the mounting hole 100 of 1.

The insertion portion 6 of the endoscope 3 is inserted into the second mounting hole 100 so as to be loosely fitted therein. The base end of the second mounting hole 100 is on the side of the third inclined surface 69, and the shape of the hole is changed to an elliptical shape toward the elbow 61.

The insertion portion 6 of the endoscope 3 passes through the second groove 101 provided in the connecting member 59. This second groove 1
01 is provided side by side with the first groove 65 for the rotation treatment member 70. The scope guide 43 described with reference to FIG. 2 is fitted and fixed to the connecting member 59 similarly to the shaft guide 42. Scope guide 43, connecting member 59, tip member 6
The insertion portion 6 is inserted through the inside of 2.

A scope groove 103 is circumferentially provided on the outer peripheral surface of the distal end forming member 102 of the insertion portion 6. Retaining 8
2 is fixed to the distal end member 62 so as not to move in the axial direction so as to be combined with the scope groove 103. This state is also shown in FIG. Then, when the retainer 82 is rotated, the retainer 82 is rotated.
The combination of and the scope groove 103 is released, and the insertion portion 6 can be removed from the treatment instrument body 1.

The operation of the industrial endoscope apparatus of the first embodiment having the above-mentioned structure will be described below. (1) Bending (curving) operation The motor 5 and the rotation treatment member 70 are assembled. The regulating shaft 31 on the right side of the pulling shaft 25 is
The first spring 34 presses the right end of the restriction groove 32.

The linear guide tube 12 is inserted into the inspection hole 17 of the jet engine, for example, as shown in FIG. When the lever 13 is rotated, the wire 15 is attached to the pulley 14.
Is wound up.

The slider 3 is interlocked with the movement of the wire 15.
8 moves to the hand side. After moving the gap provided in advance,
The second spring 37 contacts the inner pipe receiving member 29. Since the spring constant of the first spring 34 is smaller, the first spring 34 is first compressed. In response to this, the inner pipe receiving member 29 moves to the hand side (the regulation pin 31 moves leftward in the regulation groove 32).

With the movement of the inner pipe receiving member 29, the inner pipe 2
8, the connection member 59, and the tip member 62 move to the hand side.
Since the outer tube 27 is fixed to the treatment instrument body 1,
The third inclined surface 69 of the tip member 62 and the tips of the first inclined surface 60 of the outer tube 27 collide with each other. With the movement of the inner pipe receiving member 29, the tip member 62 rotates about the tip shaft 63.
FIG. 5B shows a state in which the outer tube 27 and the inclined surfaces 60 and 69 of the tip member 62 are completely in contact with each other. When the tip member 62 rotates, the retaining wire 96 is pulled and the tension spring at the end is extended.

When the inner tube receiving member 29 is further moved,
Since the inclined surfaces 60 and 69 are completely in contact with each other, the inner pipe receiving member 29, the inner pipe 28, and the tip member 62 cannot move,
The second spring 37 is compressed. At this time, the regulation pin 31 is in the middle of the regulation groove 32. The indexing shaft 25 is also in the middle of the groove 24.

The restoring force generated by the compression of the second spring 37 serves as a force for pushing the inner pipe receiving member 29 toward the hand side, and as a force for strongly pushing the tip member 62 and the first contact surface 60 of the outer pipe 27. To work. The bending state of the tip member 62 is firmly held by this force.

To release the bending, the lever 13 is operated in the opposite direction. When the lever 13 is returned, due to the restoring force of the compression of the second spring 37 and the first spring 34, the inner pipe receiving member 2
9, the inner tube 28, and the tip member 62 are pushed toward the tip side.
Since the first spring 34 is previously compressed and incorporated, the restriction pin 31 is returned to the abutment of the right side groove of the restriction groove 32 by the restoring force of compression.

The first inclined surface 60 of the outer tube 27 and the tip member 6
The third inclined surface 69 of No. 2 is separated, and the restoring force of the tension spring (not shown) described in FIG. 8 that tries to return to the free length effectively acts on the tip member 62, and the second inclination of the connecting member 59. The tip member 62 is rotated until the surface 64 contacts the third inclined surface 69 of the tip member 62. Thereby, the treatment instrument body 1
The guide tube 12 and the tip member 62 are held straight. Therefore, it can be removed from the inspection hole 17.

(2) Rotation of the rotation treatment member 70 When the tip member 62 is in the bent state, the rotary grindstone 16 is opposed to the turbine blade 18, and then the motor 5 is rotated. Rotational force is transmitted to each of the motor joint member 50 and the connecting shaft 56, and the flexible shaft 58 further rotates. Flexible shaft 58 rotates within coil 44. The rotation of the flexible shaft 58 causes the rotary grindstone 16 to rotate. The portion of the turbine blade 18 facing and contacting the rotary grindstone 16 can be scraped, and the damaged portion can be ground to eliminate (eliminate) the damage. In this case, the turbine blade 18 is shaved while confirming the visual field image of the endoscope 3 displayed on the monitor 11.

(3) Attachment / Detachment of Endoscope 3 and Rotation Treatment Member 70 and Fall Prevention Mechanism From the above structure, in order to replace the rotary grindstone 16 due to abrasion of the rotary grindstone 16 or the like, the retainer 82 should be operated and as shown in FIG. Rotate the retainer 82 clockwise (the retainer 82 and the mounting hole 68
The rotation treatment taste member 70 can be easily taken out by rotating the whetstone 16 to release the engagement (hooking) and then pulling out the rotary grindstone 16 toward the tip end side (until the interference of No. is eliminated). Also, if the reverse operation is performed, the mounting can be easily performed.

In the mounted state, all the members of the rotation treatment member 70 directly and indirectly interfere (catch) with the retaining member 82, and it is possible to reliably prevent the members from falling off during use.

Similarly, the endoscope 3 can be easily attached and detached by combining (removing as a result) the retainer 82 and the scope groove 103 of the distal end constituting member 102 or releasing them. In the mounted state, the most distal member of the endoscope 3 is directly hooked on the retainer 82.

When the mounting is incomplete, the retainer 82
It projects from the outer diameter of the tip member 62. Although the path of the flexible shaft 58 becomes longer due to the bending, the tip member 62 fixing the flexible shaft 58 is pulled toward the hand side in response to the bending operation, so that the lengthening is offset. .

The first embodiment has the following effects. 1. The entire rotation treatment member can be easily replaced and there is no risk of parts falling off. 2. The protrusion of the retaining member protruding from the outer diameter of the tip member allows the user to be notified of the mounting defect.

(Second Embodiment) A second embodiment is shown in FIGS. FIG. 10 is a detailed vertical sectional view of the distal end portion of the rotation treatment member 150, and FIG. 11 is a front view of the distal end member 151. The present embodiment is a modified structure of the attachment structure of the distal end portion of the rotation treatment member 70 of the first embodiment.

As shown in FIG. 10, a flexible shaft 153 is connected to the rotary grindstone 152 by soldering. The shaft portion 154 of the rotary grindstone 152 has three bearings 15.
It is fitted in 5 and is rotatable (all three bearings 155 are the same). A disc-shaped sliding plate 156 made of a phosphor bronze plate is interposed between the right and center bearings 155.
The outer diameter is smaller than the bearing 155. The inner diameter is larger than the shaft portion 154.

A retaining shaft 157 is arranged between the two sliding plates 156. The retainer shaft 157 has a shaft portion 1
It is fitted in the lateral hole 154 a of 54. Retaining shaft 15
The length of 7 is larger than the outer diameter of the shaft portion 154 and does not collide with the inner diameter portion of the housing member 158 described later.

The housing member 158 has a bearing 155.
Is installed by press fitting. The reduced diameter portion 161 at the tip of the cover 160 is in contact with the end surface of the right bearing 155.
The dimension of the reduced diameter portion 161 is smaller than the outer diameter of the bearing 155 and larger than the outer diameter of the shaft portion 154.

There is one opening 162 on the side surface of the cover 160. The inside diameter of the opening 162 is larger than the outside diameter of the retaining shaft 157. The cover 160 is detachably attached to an attachment hole 164 formed in the tip member 151. One protrusion 1 is provided on the outer peripheral side of the base end of the cover 160.
63 is provided.

The tip portion of the rotation treatment member 150 described above is detachably mounted in the mounting hole 164 provided in the tip member 151.

As with the first embodiment, the tip member 151 is provided with an opening / closing stopper 165. The retainer 165 makes surface contact with the tip end side end surface of the protrusion 163 and also abuts the outer periphery of the cover 160.

As shown in FIG. 11, the retainer 165 interferes with the protrusion 163. The endoscope 3 and the retainer 165 are combined by the same method as in the first embodiment. A storage hole 166 for storing the retaining member 165 is formed in the tip member 151. Mounting hole 164 and storage hole 16
6 is connected.

The other structure is the same as that of the first embodiment, and the description thereof is omitted. Next, the operation will be described.
Similar to the first embodiment, all the components of the rotation treatment member 150 directly and indirectly abut the retainer 165.

The retainer 165 is rotated and the rotation treatment member 150 is inserted into the distal end member 151 from the base end side while maintaining the opened state. The housing hole 166 and the protrusion 163 are aligned with each other, and the cover 160 is inserted until it abuts.
The retaining force of the leaf spring 89 is left to the retaining device 165, and the retaining device 165 is brought into a closed state (a state in which the projection 163 is caught by the retaining mechanism 165 and is combined with the scope groove of the endoscope 3).

When removing, the rotation treatment member 150 is pulled out while the open state is maintained by rotating the retainer 165. The second embodiment has the following effects.

[0111] 1. It is possible to prevent the coil and the housing from rotating together by following the rotation of the flexible shaft due to the combination of the housing holes of the protrusions. 2. Since the shaft length received by the shaft bearing can be increased, wobble of the shaft can be reduced.

[0112] 3. Since the outer diameter of the protrusion is larger than the outer diameter of the cover according to the first embodiment, the amount of the stopper coming out of the tip member increases when the mounting is not completed, and the user can easily notice. 4. Shaft processing becomes easy. 5. The entire rotation treatment member can be easily replaced and there is no risk of parts falling off.

(Third Embodiment) Next, a third embodiment of the present invention will be described. The present embodiment realizes an industrial endoscope apparatus capable of reducing rotational force transmission loss and heat generation by increasing the curvature of the rotational force transmission member without increasing the outer diameter of the tip member. Further, a rotary treatment member having a large outer diameter can be used without increasing the diameter of the insertable hole, and an industrial endoscope apparatus having high grinding ability is realized.

FIG. 12 is a sectional view showing the structure of the tip side of the third embodiment. The rotation shaft of the rotation treatment member 70 including the rotary grindstone 16 is attached so as to be inclined with respect to the tip member 62 ', and the retainer 83 is inclined with respect to the tip member 62'. A mounting hole 68 'is formed in the tip member 62' with a slight inclination with respect to the longitudinal direction of the tip member 62 '.
The rotation treatment member 70 is inserted therethrough, and is prevented from coming off by the coming-off stopper 83 housed in the coming-off preventing groove 81 '.

The retaining groove 81 'is also formed to be slightly inclined from the direction orthogonal to the longitudinal direction of the tip member 62'. Here, a retaining groove 81 'is formed in a direction perpendicular to the rotation axis of the rotation treatment member 70, and the retaining groove 8'
This is the same as in the first embodiment in that the retainer 83 is housed in the 1'to prevent the retainer from coming in at a right angle.

Further, except for the angle of the inclined surface, it is the same as that of the first embodiment and is designated by the same reference numeral. The insertion portion 6 of the endoscope 3 (not shown) is also inclined at the same angle. In the depth direction of FIG. 12, there is no inclination between the rotation treatment member 70 and the insertion portion 6, and it is parallel to the axis of the tip member 62. Rotary whetstone 16
The axis of is perpendicular to the axis of the guide tube 12.

In this embodiment, the rotation treatment member 7 is used.
Although the rotation axis of 0 and the axis of the endoscope are described as being parallel to each other, they may not be parallel to each other. In that case, there is an effect that it becomes easy to observe a portion where the rotary grindstone 16 and the blade are in contact with each other.

Next, the operation will be described. The operation for obtaining the bending is the same as in the first embodiment. In this case, since the tip of the endoscope 3 is also tilted at the same time, the observation field of view obtained does not change.

Since the rotation treatment member 70 is disposed so as to be inclined, the rotation treatment member 70 is separated from the tip shaft. Hijiji 61
The space for the rotation treatment member 70 is widened inside, and the curvature of the rotation treatment member 70 is increased.

The effects of this embodiment are as follows. 1. Rotational force transmission loss and heat generation can be prevented. 2. The grinding ability can be improved by increasing the diameter of the grindstone.

The structure of the endoscope 3 used in the first embodiment and the like will be described below. 13 is an external view of the endoscope 3, FIG. 14 is a vertical cross-sectional view showing the structure of the distal end side of the insertion portion 6 of the endoscope 3, and FIG. 15 is a lens frame 206 incorporated in the distal end constituent member of the endoscope 3. 17 is a horizontal cross-sectional view, and FIG. 16 is a vertical cross-sectional view showing the structure of the connecting portion between the insertion portion 6 and the operating portion 9.
FIG. 8 is a front view showing a fixed state of a fixed wire 219.

As shown in FIG. 13, the operating portion 9 has a cylindrical shape. A C mount 33 is provided at the rear end of the operation unit 9. Since the C mount 33 uses a ratchet mechanism (not shown), it can be freely rotated and fixed. The fixation is released with the release button 252. Ratchet cover 200 and C
The mount 33 rotates.

An imaging optical system (not shown) is arranged inside the operation unit 9. The light flux that has passed through the image forming optical system forms an observation image at an image forming position determined as a device that employs the C mount 33.

A flexible insertion portion 6 is provided on the distal end side of the operating portion 9, and a distal end constituting member 102 having an illumination optical system and an observation optical system at the distal end of the insertion portion 6 as shown in FIG.
Are formed.

On the outer peripheral side of the rear end portion of the front end forming member 102, a conventional flexible tube 214 having the same structure (from the inside to the flex 215,
A three-layer structure including a blade 216 and an outer coating resin 217 is fitted. An image guide fiber bundle (IG) 201 and a light guide fiber bundle (LG) 202 are inserted into the insertion portion 6.

L introduced from the flexible pipe 214 into the operating portion 9
The G202 is introduced into the light guide cable 7 and fixed to the connector 7a (see FIG. 1). As shown in FIG. 13, in order to gently bend the insertion portion 6,
A folding member 203 is provided at a connecting portion between the front end of the operation portion 9 and the rear end of the insertion portion 6.

One plate-shaped fixed plate 204 is attached to the operation portion 9 by means of a screw 231.
At the center of the fixed plate 204, there is a fixed female screw 205. (It is this fixed female screw 205 that the mounting screw 4 is screwed in in FIG. 1) As shown in FIG.
An objective lens 227 is disposed in the lens frame 206 of the tip forming member 102 at the tip of the IG 201, and the end surface of the IG 201 is located at the position where the observation image is formed. There are two protrusions 207 at the rear end of the lens frame 206 (see FIG. 15). Protrusion 2
The distance from the tip of 07 to the other end (height of the protrusion) is larger than the inner diameter of the LG base 208 described later.

LGs are concentrically formed around the lens frame 206.
202 is provided and forms the emission end of the illumination light. The tip is pipe-shaped and protected by a metal LG base 208. The emitting end of LG 202 is previously molded with an adhesive. The inner diameter portion of the exit end of the LG 202 after molding and the lens frame 206 are fixed with an adhesive.

The LG base 208 is fixed to the tip forming member 102 with an adhesive. An adhesive is applied to the two adhesive holes 209 provided in the tip forming member 102. A reduced diameter portion 210 is provided on the inner diameter portion of the tip forming member 102,
The inner diameter is smaller than the outer diameter of the LG base 208.

The emission end of LG 202 is recessed from the front end surface of lens frame 206. The portion is sealed with a metal (donut-like) light-transparent transparent adhesive 211. A scope groove 103 is provided on the entire outer circumference of the tip forming member 102, and engages with the retainer 82 to provide the tip member 62.
It can be fixed to.

Two notches 213 are formed in the axial direction from the rear end of the tip forming member 102 to the wire fixing groove 212.
Are provided symmetrically. The notch 213 reaches the inner diameter portion of the tip forming member 102.

On the end surface of the flexible tube 214, a portion of the outer coating resin 217 is chamfered. Tip constituent member 1 facing it
The root of 02 is also chamfered. The valley portion 218 formed by chamfering the both is filled with an adhesive.

The fixing wire 2 is placed in the wire fixing groove 212.
19 is fixed by soldering. The fixed wire 219, which is wound around the outer peripheral portion of the tip forming member 102 half way, enters the inside of the insertion portion 6 from the intersection of the wire fixing groove 212 and the two notches 213.

The thickness of the fixed wire 219 is smaller than the wall thickness of the tip constituent member 102 in the portion where the flexible tube 2124 is fitted. As shown in FIG. 16, the other end of the fixed wire 219 is inserted through the inside of the flexible tube 214, and is fixed to the fixed plate 220 provided in the operation portion 9 with a screw 221 so as to have a slight slack.

As shown in FIG. 17, the fixing plate 220 is mounted in the operating portion 9 by fixing screws 222. The IG 20 is inserted in the insertion hole 223 provided in the center of the fixed plate 220.
1, LG202 is passing. The fixed wire 219 is passed through the wire insertion hole 224, wound around the screw 221 and fixed so as to be pressed against the fixed plate 220.

With such a structure,
(1) Even if the adhesive at the tip is broken, it can be supported by a fixed wire, so no parts fall off. (2)
Since it is exclusively for the C mount, it can be made smaller.

(Fourth Embodiment) Next, a fourth embodiment of the present invention will be described with reference to FIGS.
In this embodiment, as shown in FIG. 18, the structure is such that the distance L from the center of the guide tube 12 to the center of the rotary grindstone 16 can be changed.

First, the technical background will be described. Generally, a gas turbine engine used in an aircraft is provided with a hole (hereinafter referred to as an access port) for inspecting a compressor blade or a turpin blade for each blade.

The treatment tool according to the present embodiment is to insert the treatment tool from the access port and grind the damaged portion of the edge of the compressor blade to perform treatment on the damaged portion. The distance to the blade is different for each access port location.
Also, it differs for each engine model. Therefore, in order to grind a damaged portion of the edge of the blade, it is necessary to change the distance from the center of the insertion portion of the treatment tool to the center of the rotary grindstone for each access port or each engine model.

As a prior art related to this, the actual Kaihei 5-
Japanese Patent No. 29016 discloses a mechanism for changing the distance of a grindstone provided at the tip of the endoscope from the tip of the endoscope.
The drawback of this prior art is that a mechanism for varying the amount of protrusion of the grindstone at the tip of the endoscope is required, and the outer diameter of the endoscope becomes large.

Japanese Unexamined Patent Publication No. 4-102816 discloses a flexible shaft exchange mechanism integrated with a grindstone provided at the tip of an endoscope. The drawback of this prior art is that no means for varying the distance from the tip of the endoscope to the grindstone is shown, and the distance from the tip of the endoscope to the grindstone is always kept constant. Therefore, it has a drawback that it can be used only at a specific access port of the gas turpin engine.

Therefore, the purpose of the present embodiment is to change the distance L from the center of the guide tube 12 to the center of the rotary treatment member 70 shown in FIG. 18, and perform the blade grinding work at any access port of the gas turpin engine. An object of the present invention is to provide an industrial endoscope apparatus that can be used. In order to achieve this purpose, the treatment instrument main body is provided with a rotatable treatment member having a different axial length in a detachable manner.

With this configuration, the rotating treatment members having different distances from the tip of the treatment tool to the rotary grindstone when mounted on the treatment tool body are selectively used according to the distance from the access port of the engine to the blade. Hereinafter, the configuration will be specifically described.

FIG. 18 shows a cross section of the tip member 62, and FIG.
9 shows a state in which the rotary treatment member is removed from the treatment instrument main body, FIG. 20 shows a state in which a rotary treatment member having a long axial length of the rotary grindstone is attached, and FIG. 21 shows a rotary treatment member having a rotary grindstone with a different axial length. 22A and 22B show a state in which the edge of the blade of the engine is being ground.

In this embodiment, the attachment / detachment mechanism for the tip member 62 and the rotation treatment members 70a, 70b is the same as that of the first embodiment.

The rotation treatment member 70 shown in FIGS. 18 and 19.
Reference numeral a denotes, for example, the same rotary treatment member 70 as in the first embodiment, and in the present embodiment, a shaft portion 75 as shown in FIG.
Rotation treatment member 70 in which a, 75b, and 75c have different lengths
It has a, 70b, 70c and is suitable for the object to be used.

For example, when the distance to the portion to be ground is long, the rotation treatment member 70b having the shaft portion 75b having a long axial length is mounted as shown in FIG. In the present embodiment (of FIGS. 18 to 22), the mounting structure of the endoscope 3 not shown is the first.
This is the same as the embodiment.

Further, the rotation treatment member 70a shown in FIG.
The shapes of the grindstones 16a, 16b, 16c of 70b, 70c may be different from each other. Next, the operation of this embodiment will be described with reference to FIG.

FIG. 22A shows the access port 302 of the engine 301. When the distance from the axis center of the access port 302 to the edge 309 of the blade 303 is La, the rotation treatment member having an axial length such that the distance from the axis center of the guide tube 12 to the grindstone center is substantially equal to La ( For example, 70a) is selected and attached to the treatment instrument body 1.

The treatment instrument main body 1 is connected to the access port 302.
And the tip member 62 is bent 90 °. At this time, the distance La from the center of the guide tube 12 to the center of the grindstone 16a is substantially equal to the distance La from the access port 302 to the edge 309 of the blade 303, so that the edge 309 can be easily ground.

FIG. 22B shows the access port 304 of the engine 301. When the distance from the axial center of the access port 304 to the edge 310 of the blade 305 is Lb, the rotation treatment member 70b is selected so that the distance from the axial center of the guide tube 12 to the grindstone center is substantially equal to Lb. Attached to the treatment instrument body 1.

The treatment instrument main body 1 is connected to the access port 304.
And the tip member 62 is bent 90 °. At this time, the distance from the center of the guide tube 12 to the center of the grindstone is the distance L from the access port 304 to the edge 310 of the blade 305.
Since a is substantially the same, the edge 310 can be easily ground.

The effects of this embodiment are as follows. 1. By replacing only the rotary treatment tool used for the treatment tool main body, the blade can be ground from any access port provided in the gas turbine engine. Blade treatment can be performed inexpensively because a single treatment tool body can be used.

[0154] 2. Since the grindstone shape of the rotary treatment tool that is most suitable for the shape of the blade to be ground can be selected, the grinding work can be performed efficiently and in a shorter time.

(Fifth Embodiment) Next, a fifth embodiment of the present invention will be described. The technical background of this embodiment is the same as that of the fourth embodiment. As a prior art, JP-A-3-158819 discloses an endoscope in which an optical adapter at the tip of an endoscope and a grindstone are integrally detachably provided.

However, no means for varying the total length of the optical adapter is shown. Therefore, the distance from the center of the endoscope to the grindstone is always constant, and there is a drawback that it can be used only in a specific access port of the gas turbine engine.

Therefore, in the present embodiment, as shown in FIG. 25, the distance La from the center of the guide tube 12 to the center of the rotary treatment member 70 is changed, and the blade grinding work is performed from any access port of the gas turbine engine. It is an object of the present invention to provide an industrial endoscope system or a treatment tool system capable of performing the above.

In order to achieve this object, a distal end member having a different length is detachably provided on the distal end portion of the treatment instrument body. With this configuration, the tip members having different distances from the guide tube center of the treatment instrument body to the rotary grindstone when mounted on the treatment instrument body are selectively used according to the distance from the access port of the engine to the blade.

Hereinafter, a specific description will be given with reference to FIGS. FIG. 23 shows a state in which a short tip member is attached, and FIG.
Shows a state in which a long tip member is attached, as shown in FIG.
(B) shows a state in which the edge of the engine blade is being ground.

The rotation treatment member 339 according to the present embodiment.
The attachment / detachment mechanism of 340 and 340 is the same as that of the first embodiment.
The tip member 338 includes a first tip member 330 and a second tip member 331. A convex portion 335 of a fixing ring 334 provided with a female screw 332 is fitted into a concave portion 336 formed on the outer peripheral surface of the first tip member 330 and is rotatably provided.

The male screw 3 is attached to the other second tip member 331.
33 is provided, and the female screw 332 of the fixing ring 334 is provided.
The first tip member 330 and the second tip member 331 are integrally fixed by screwing with. Like the tip member 62 in the first embodiment, the first tip member 330 has a retaining groove 81 formed therein, and the retaining element 82 is housed therein. The retainer 82 is biased by a leaf spring (not shown) toward the bottom of the retainer groove 81, and is rotatably supported by a retainer shaft (not shown). Also, the guide tube 12
The structure such as is similar to that of the first embodiment and is denoted by the same reference numeral.

FIG. 24 shows a first tip member 33 having a different total length.
7 shows a state in which 7 is attached to the second tip member 331, and a rotation treatment member 340 having a flexible shaft 58 longer than the rotation treatment member 339 and a coil 44 in which the flexible shaft 58 is loosely fitted is attached.

Like the tip member 62 in the first embodiment, the first tip member 337 is formed with a retaining groove 81, and a retaining member 82 is housed therein. The retainer 82 is biased by a leaf spring (not shown) toward the bottom of the retainer groove 81, and is rotatably supported by a retainer shaft (not shown). Further, the structure of the guide tube 12 and the like is similar to that of the first embodiment, and is indicated by the same reference numeral.

The rotation treatment members 339 and 340 are the shaft portion 75.
The tip side to the grindstone 16 has the same length, and the lengths on the flexible rotational force transmitting means side (specifically, the flexible shaft 58 and the coil 44) differ by Lb-La. Further, the lengths of the first tip members 337 and 330 differ by exactly Lb-La (of course, the first tip member 337 is longer).

Next, the operation of this embodiment will be described. First
It is possible to fix the first tip member 330 to the second tip member 331 by screwing the fixing ring 334 of the tip member 330 into the male screw 333 of the second tip member 331. After that, as shown in the first embodiment, the rotation treatment member 339 and the endoscope 3 (not shown) are attached.

As shown in FIG. 25A, in the case of the access port 302 of the gas turbine engine 301, the first tip member 330 and the rotation treatment member 339 are used in combination. At this time, La is substantially equal to the distance between the access port 302 and the edge 343 of the blade 341. Therefore,
Can be easily ground.

In the case of FIG. 25B, the first tip member 33.
7 and the rotation treatment member 340 are combined, and the distance from the central axis of the guide tube 12 to the rotation treatment member 340 is Lb.
At this time, the distance between the access port 304 and the edge 344 of the blade 342 and Lb substantially match. Therefore, it can be easily ground. The method of mounting the endoscope 3 is the same as in the first embodiment.

This embodiment has the following effects. 1. By exchanging only the tip member and the rotating treatment member used for the treatment instrument main body, the blade can be ground from any access port provided in the gas turbine engine. Blade treatment can be performed inexpensively because a single treatment tool body can be used.

2. In the method shown in the fourth embodiment, since the shaft of the rotation treatment member is longer than the bearing portion, rattling and vibration of the grindstone may increase, which may hinder the grinding work. However, in the present embodiment, the bearing portion is Since the distance from the wheel to the grindstone is constant, the rattling and vibration as described above can be reduced.

As shown in FIG. 23 or 24, the first tip member 330 or 337 is replaced with the second tip member 33.
1 is fixed by screwing with a fixing ring 334, and then a C ring is housed in a concave portion 336 adjacent to the fixing ring 335 to prevent the fixing ring 334 from being unscrewed by engaging the C ring. It may be provided so as to surely prevent the screw engagement from being disengaged during use of the rotation procedure. Note that different embodiments can be configured by partially combining the above-described embodiments and the like, and these also belong to the present invention.

[Additional Notes] 1. In an industrial endoscope apparatus including an observation optical system and an illumination optical system, a bendable endoscope, and a guide tube having a rotational force transmitting means for transmitting a rotational force inserted thereinto, a tip of the guide tube Side end portion that is bendably supported, an opening that is provided in the tip member and that communicates with the inside of the guide tube, and is insertable into and removable from the opening, is connected to the rotational force transmitting means, and is connected by a bearing means. A rotation treatment member that is rotatably supported and that performs treatment such as grinding on a target member by rotation,
A hooking portion that restricts the movement in the axial direction by a hook so that the bearing means does not move in the axial direction of rotation, and an interference means having a releasing means that can release the hooking by the hooking portion, An industrial endoscopic device having:

[0172] 2. The appendix 1 characterized in that the tip member has a second opening for inserting the endoscope, and the interference member has a second hooking portion for axially fixing the endoscope. Industrial endoscopy equipment.

[0173] 3. The industrial endoscope apparatus according to appendix 1, wherein the tip member includes an elastic member that biases the interference member toward the center of the opening.

[0174] 4. The tip member has a slit provided in a plane that intersects with the rotation axis, and in the slit, with respect to an axis provided in the axial direction of the tip member at a position away from the center of the tip member. The industrial endoscope apparatus according to appendix 1, wherein a rotatable interference member is housed.

[0175] 5. An industrial endoscope apparatus including a bendable endoscope including an observation optical system and an illumination optical system, and a guide tube through which a rotational force transmitting unit that transmits a rotational force to a rotational treatment member that grinds a damaged portion is inserted. In the above, the guide tube has a double structure of an inner tube and an outer tube, and an inner tube that can advance and retreat in the axial direction with respect to the outer tube, and a first spring that constantly biases the inner tube in the distal direction. A main body which is fixed to the outer pipe and abuts the first spring, a second spring having a higher spring constant and a shorter length than the first spring, and the inner pipe on the main body side. A slide mechanism for moving the second spring through the second spring,
The outer pipe is fixed to the inner pipe, rotates by being pushed by the outer pipe, and has an abutting portion that abuts a tip end of the outer pipe when the inner pipe moves. An industrial endoscope apparatus, comprising: a distal end rotation mechanism that stops at a predetermined rotation angle when it hits.

(Operation of Supplementary Note 5) The second spring moves toward the main body in accordance with the movement of the slide mechanism. The second spring moves the inner pipe toward the main body. The first spring is compressed in response to the movement of the inner tube. In accordance with the movement of the inner pipe, the tip rotation mechanism contacts the tip of the outer pipe and rotates. When the tip end rotating mechanism comes into contact with the tip end portion of the outer tube, a predetermined rotation angle is reached and the rotation ends. When the slide mechanism further moves, the inner tube does not move, so only the second spring receives the movement of the slide mechanism and is compressed. The reaction force of the compression (the restoring force of the second spring) is transmitted through the inner pipe and acts on the abutting portion of the tip end rotating mechanism. Therefore, the outer tube and the tip end rotating mechanism firmly hold the abutting portion in close contact with each other.

(Background of Supplementary Note 5) The present invention relates to an industrial endoscope apparatus for performing grinding treatment with a rotary treatment member while observing with an industrial endoscope.

As the prior art, an industrial endoscope apparatus for repairing a turbine blade of a jet engine without disassembling is known as the one described in the prior art of the above-mentioned application. However, in such a structure, since each bending piece does not hit each other, when the grindstone is opposed to the blade by the bending operation and then the grindstone is brought into contact with the blade, the rotating grindstone reacts with the contact force of the blade. Therefore, there is a problem that the curved portion is repelled, and stable treatment cannot be performed.

Normally, when the above-mentioned industrial endoscope apparatus is used inside a jet engine, an access port (a hole for inspecting the inside of the engine) provided toward the inside of the engine is used. The bending portion of the endoscope device cannot be bent unless it extends from the access port to the inside of the engine.
Therefore, there is a problem that the rotation treatment member cannot be opposed to the vicinity of the blade tip portion near the access port.

Therefore, at the curved portion at the distal end of the guide tube 12 of the endoscope device, the parts constituting the curved portion make surface contact without rattling, the curved shape is stably maintained, and the curvatures of the curved portions are also compared. A relatively small one is shown in Japanese Patent Application No. 7-152025.

(Problem) However, Japanese Patent Application No. 7-152025
The issue does not show a mechanism for holding a stable shape when a force that reverses the bending acts on the bending portion. (Purpose) Therefore, an object of the present invention is to provide an industrial endoscope apparatus that can stably maintain a curved shape, and the structure of Appendix 5 is adopted to achieve this object. (Effect of Supplementary Note 5) By the restoring force of the compression of the second spring, the contact of the inclined surface (bending of the tip portion) can be stably maintained. 6. 6. The industrial endoscope apparatus according to appendix 5, wherein the endoscope is fixed to the main body.

7. In an industrial endoscope apparatus including a bendable endoscope including an observation optical system and an illumination optical system, and a guide tube through which a rotational force transmitting unit that transmits a rotational force to a grinding member that grinds a damaged portion is inserted The tip end member is bendable at the tip of the guide tube, the opening is inclined with respect to the central axis of the end member, and the grinding member is detachable from the opening.

(Operation of Supplementary Note 7) The rotational force transmitting means connected to the grinding member obliquely attached to the tip portion has a large curvature when bent inside the curved portion of the guide tube tip.

Further, even a rotation treatment member having an outer diameter that originally protrudes from the outer diameter of the tip can be accommodated within the range of the outer diameter of the tip by tilting the shaft.

(Background of Appendix 7) Appendix 5 up to the point before the problem
Same as the background.

(Problem) Conventionally, the axis of the rotary grindstone and the axis of the guide tube and the tip member were parallel. In such a configuration,
If the outer diameter of the guide tube and the tip is made smaller so that it can be adapted to any jet engine inspection hole, the space for bending the rotational force transmitting member becomes narrower, and sliding with the coil to rotationally drive the rotational force transmitting member. There was a risk that the resistance would increase and the rotation drive could be hindered. The sliding resistance causes heat generation and transmission loss of rotational force.

Further, conventionally, the rotating grindstone for increasing the curvature of the rotational force transmitting member has been designed as far away from the tip axis as possible.

However, if the outer diameter of the rotary grindstone is determined within a range that does not extend beyond the outer diameter of the tip member, the outer diameter tends to decrease. If the outer diameter of the grindstone decreases, the peripheral speed of the grindstone decreases and the grinding ability decreases. Will fall. (Purpose) Therefore, in Supplementary Note 7, the following a and b are the objects of the invention. a. (EN) Provided is an industrial endoscope device which has a small rotational force transmission loss and a small amount of heat generation by increasing the curvature of a rotational force transmission member without increasing the outer diameter of the tip member. b. (EN) Provided is an industrial endoscope device having a high grinding ability, which can use a rotating treatment member having a large outer diameter without increasing the diameter of the insertable hole.

In order to achieve this object, the structure of Appendix 7 is adopted. 8. In a treatment instrument system having an observation optical system and a detachable rotation treatment member, a rotation treatment member capable of selecting at least two or more distances from the treatment instrument tip to the rotation treatment member when the rotation treatment member is mounted on the treatment instrument. A treatment instrument system having. 9. A treatment instrument having an observing optical system and a rotation treatment member which is attached / detached at the time of attachment / detachment, wherein a distal end portion length varying member is detachably provided at the tip of the treatment instrument.

[0190]

As described above, according to the present invention, a flexible endoscope including an observation optical system and an illumination optical system,
In an industrial endoscope apparatus provided with a guide tube inserted with a rotational force transmitting means for transmitting a rotational force, a distal end member bendably supported on the distal end side of the guide tube, and provided on the distal end member, An opening communicating with the inside of the guide tube, which is insertable into and removable from the opening, is connected to the rotational force transmitting means, is rotatably supported by a bearing means, and rotates to perform a treatment such as grinding on a target member. A rotation treatment member to be performed, a hooking portion for restricting the movement of the bearing means in the axial direction by a hook so that the bearing means does not move in the axial direction of rotation, and a releasing means capable of releasing the hooking by the hooking portion. With the interference means having the above, it is easy to replace the entire rotation treatment member, and there is no fear of parts falling off.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an industrial endoscope apparatus according to a first embodiment of the present invention.

FIG. 2 (A) is a vertical cross-sectional view showing the configuration of a treatment tool body, and FIG. 2 (B) is a side view showing a wire connecting portion.

FIG. 3 is a vertical cross-sectional view for explaining a portion connecting a motor and a flexible shaft.

FIG. 4 is a cross-sectional view showing the shape of a motor joint member.

FIG. 5 is a vertical cross-sectional view showing a structure of a rotation treatment member in a straight state and a bent state.

FIG. 6 is a cross-sectional view showing the relationship between the removal mechanism, the endoscope, and the rotation treatment member.

FIG. 7 is a plan view of the tip side of FIG.

FIG. 8 is a vertical sectional view showing a leaf spring fixing structure.

FIG. 9 is a vertical cross-sectional view showing the distal end side of the endoscope.

FIG. 10 is a vertical cross-sectional view showing the distal end portion of the rotation treatment member.

11 is a front view showing the tip of the tip member taken along the line AA of FIG.

FIG. 12 is a cross-sectional view showing the structure on the distal end side according to the third embodiment of the present invention.

FIG. 13 is an external view showing the vicinity of the operation unit of the endoscope.

FIG. 14 is a vertical cross-sectional view showing details of the distal end side of the endoscope.

FIG. 15 is a transverse cross-sectional view showing a lens frame incorporated in the distal end portion of the endoscope.

FIG. 16 is a vertical cross-sectional view showing a connecting portion between the insertion portion and the operation portion.

FIG. 17 is a front view showing a fixed state of a fixed wire.

FIG. 18 is a cross-sectional view showing the structure of the tip member according to the fourth embodiment of the invention.

FIG. 19 is an explanatory view showing a state in which the rotary treatment member is removed from the treatment instrument body.

FIG. 20 is an explanatory view showing a state in which a rotation treatment member having a long axis of the rotary grindstone is attached.

FIG. 21 is a view showing a rotation treatment member in which the rotational grindstones have different axial lengths.

FIG. 22 is a schematic explanatory view showing a state in which an edge of an engine blade is being ground.

FIG. 23 is a view showing a state in which a short tip member is attached.

FIG. 24 is a view showing a state in which a long tip member is attached.

FIG. 25 is a view showing a use state in which an edge of an engine blade is ground.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Treatment tool main body 2 ... Stay 3 ... (Industrial) endoscope 5 ... Motor 6 ... Insertion part 8 ... Light source device 9 ... Operation part 10 ... CCD camera 11 ... Monitor 12 ... Guide tube 13 ... Lever 14 ... Pulley 15 ... Wire 16 ... Rotating grindstone 17 ... Inspection hole 18 ... Turbine blade 22 ... Main body 27 ... Outer tube 28 ... Inner tube 34, 37 ... Spring 38 ... Slider 42 ... Shaft guide 43 ... Scope guide 44 ... Coil 58 ... Flexible shaft 59 ... Connection member 61 ... Hinge portion 62 ... Tip member 63 ... Tip shaft 68 ... Mounting hole 70 ... Rotation treatment member 71, 72 ... Bearing 75 ... Shaft portion 77 ... Shaft mounting hole 78 ... Flange portion 81 ... Fall prevention groove 82 ... Fall prevention 83 ... retaining shaft 88 ... notch 89 ... leaf spring

Claims (1)

[Claims] 1. An industrial endoscope apparatus comprising an observation optical system and an illumination optical system, comprising a bendable endoscope and a guide tube having a rotational force transmitting means for transmitting a rotational force inserted therethrough. A tip member flexibly supported on the tip side of the guide tube, an opening provided in the tip member and communicating with the inside of the guide tube, and an insertable / removable member with respect to the opening and connected to the rotational force transmitting means. And a rotation treatment member that is rotatably supported by bearing means and that performs a treatment such as grinding on a target member by rotation, and a movement in the axial direction so that the bearing means does not move in the axial direction of rotation. An industrial endoscope apparatus comprising: a hooking portion that is restricted by a hooking; and an interference means that has a releasing means that can release the hooking by the hooking portion.