JPH0588095A - Industrial endoscope for recovering foreign matter - Google Patents

Abstract

PURPOSE:To provide an industrial endoscope for recovering a foreign matter by which a foreign matter can be easily recovered. CONSTITUTION:The industrial endoscope for recovering 5 foreign matter 20 is formed by providing a hook forceps 26 consisting of a slender forceps shaft part 32 inserted through a channel 25 used for recovering the foreign matter and a hook part 31 formed on the tip of the shaft part 32 and a projection part 29 which is formed on the tip surface of an insertion part 21 by being extended in the shaft direction of the insertion part 21 and provided with a groove 30 for guiding the hook part 31 and which functions as a foreign matter receiving part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foreign matter collecting industrial endoscope having hook-shaped forceps.

[0002]

2. Description of the Related Art In recent years, industrial endoscopes have been widely used for inspecting the inside of pipes and jet engines in chemical plants and power plants. Inside the pipe or jet
While observing the inside of an engine with an industrial endoscope, a foreign substance (for example, a screw, a washer, or a nut) that should not be found inside a pipe or a jet engine may be found.

In addition, maintenance of pipelines and jet engines
In some cases, an operator accidentally dropped an object that could become a foreign object into a space out of reach of people during inspection. If such foreign matter is left unattended, the pipeline may be clogged and the operation of the jet engine may be hindered. In order to collect foreign matter that hinders the operation of equipment,
(A) Disassembling a part of equipment containing foreign matter,
(B) An industrial endoscope equipped with forceps for collecting foreign matter has been used.

20 and 21 show three-claw forceps 1 as forceps for collecting foreign matter in the channel of an industrial endoscope.
And the basket forceps 2 are shown. As a recovery means at the tips of the forceps 1 and 2, wire members 5 and 6 having three claw portions 3 and a basket portion 4 are inserted into the pipes 7 and 8, respectively. Then, by pulling the unillustrated proximal sides of the wire members 5 and 6 and operating the collection means at the tip to be drawn into the pipes 7 and 8, the collection range of the collection means is regulated by the inner diameters of the pipes 7 and 8. It is closed according to the amount of movement of the members 5, 6 to the proximal side.
With such an action, the forceps 1 and 2 shown in FIGS. 20 and 21 grab and collect foreign matter.

(C) Further, apart from the purpose of collecting foreign matter, an industrial endoscope equipped with hook-shaped hook forceps for inspecting a turbine blade in a gas turbine engine is disclosed, for example, in Japanese Utility Model Laid-Open No. 61-172239. Is disclosed in. The configuration of the industrial endoscope with hook forceps disclosed in this publication includes a scope with a channel, a flexible forceps shaft portion that is inserted in advance into the channel, and a hook shape or a hook attached to the tip of the forceps shaft portion. , Consisting of a fishing hook and a hook.

With the above structure, the hook portion is hooked on the turbine blade and the tip of the scope is fixed to the blade by operating the forceps shaft portion on the proximal side. The hook portion is hooked on the side portion of the turbine blade with the hook tip extending from the channel of the scope protruding from the channel outward in the circumferential direction of the scope, that is, outside the outer diameter of the scope insertion portion.

[0007]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention Disassembling a part of equipment as described in (a) above involves enormous cost and a lot of time because the whole equipment may be stopped.

Also, the forceps 1 shown in FIG. 12 corresponding to (b).
In the case of (1), even if you try to take in a foreign substance that has fallen into a large space in the recovery range, it is difficult to push the foreign substance with the forceps 1 and move it, so it is difficult to take in the foreign substance well (the foreign substance escapes and you can grasp it well. Absent.). (2) Even if it is taken in successfully, if the collecting means is pulled toward the hand side in order to grab the foreign matter with the claw (since the claw closes while the collecting means is being drawn into the pipe), the collecting means closes while separating from the foreign matter, Foreign matter cannot be collected well. On the other hand, the forceps 2 shown in FIG. 13 has the same drawbacks as the above (1).

Further, the industrial endoscope disclosed in the above publication (c) is provided with a hook-shaped forceps having a hook shape for fixing the tip of the endoscope to a turbine blade inside the gas turbine. You can try to collect foreign objects with an endoscope.

However, since the hook has a hook shape,
A space is inevitably formed between both surfaces of the tip of the insertion section and the hook, making it difficult to pinch a small object. Further, since it is a hook having a shape intended to be hooked on the blade, it has poor adaptability to foreign matter whose shape is not particularly determined.

The present invention has been made in view of the above points, and an object of the present invention is to provide an industrial endoscope for collecting foreign matter, which can easily collect foreign matter.

[0012]

In an industrial endoscope having a channel for collecting foreign matter, an elongated forceps shaft portion inserted into the channel and a hook portion formed at the tip of the forceps shaft portion are provided. A hook forceps and a foreign matter receiving portion formed at the tip of the insertion portion of the industrial endoscope and provided with a guide mechanism for the hook portion to form a foreign matter collecting industrial endoscope. It is characterized by

[0013]

With the above construction, the insertion portion is brought closer to the foreign matter.
At this time, the hook portion is guided by the guide mechanism of the foreign matter receiving portion so as to be near the distal end surface of the scope. The tip of the hook portion is moved to the other side of the foreign matter by the operation of the proximal side of the forceps, and then the foreign matter is attracted by the hook portion and held in the foreign matter receiving section for collection. At this time, the hook part
The guide mechanism is used as a guide to draw it near the distal end surface of the scope, and the hook portion prevents the foreign matter from falling off and holds the foreign matter in the foreign matter receiving portion.

[0014]

Embodiments of the present invention will be specifically described below with reference to the drawings. 1 to 8 relate to a first embodiment of the present invention, FIG. 1 is a view showing an industrial endoscope for collecting foreign matter of the first embodiment, FIG. 2 is a sectional view of a hook forceps, and FIG. 3 is a forceps tip. FIG. 4 is a cross-sectional view showing a state in which the hook portion is connected to FIG. 4, FIG. 4 is a view showing the shape of the protrusion and the action of the hook portion tip being housed in a groove formed in the protrusion (representing the locus of the hook tip), FIG. 5 is a view showing an observation image of an industrial endoscope for collecting foreign matter, FIG. 6 is a cross-sectional view of a grip for operating forceps attached to an end portion of a hook forceps on the proximal side, and FIG. 7 is an explanation of action when collecting foreign matter. 8 and 9 show the tip shape of the hook portion in the modification of the first embodiment.

As shown in FIG. 1, the industrial endoscope 20 (for collecting foreign matter) of the first embodiment has a flexible and elongated insertion portion 21.
A large-diameter or wide-width operation portion 22 that is continuously provided at the rear end portion of the insertion portion 21, an eyepiece portion 23 provided at the rear end of the operation portion 22, and an extension portion from the side portion of the operation portion 22. The hook forceps 2 which is inserted into the ejected light guide cable 24 and the channel 25 formed in the insertion portion 21 and is used for collecting foreign matter.
6 and 6.

As shown in FIG. 1, the industrial endoscope 20 has a lead-out port for the channel 25, an illumination optical system 27, and an observation optical system 28 formed on the distal end surface of the insertion portion 21. In addition, the hook forceps 2 is attached to the distal end surface of the insertion portion 21.
A wedge-shaped projection 29 is formed by cutting out the tip forming a foreign matter receiving portion for receiving the foreign matter collected in 6. The wedge-shaped projection 29 projects in the axial direction from the insertion portion 21, and the thickness thereof becomes thinner toward the tip. Protrusion 2
The outer peripheral surface of 9 is the same as the outer peripheral surface of the tip of the insertion portion 21. A groove 30 is formed in the projection 29 in the axial direction so that the hook portion 31 formed at the tip of the hook forceps 26 can be guided.

The structure of the hook forceps 26 inserted into the channel 25 is shown in FIG. As shown in FIG. 2, the hook forceps 26 forming the first embodiment is flexible and has a slender forceps shaft portion 32 that can be inserted into the channel 25.
And a hook stopper 3 formed at the tip of the forceps shaft portion 32.
The hook portion 31 is detachably attached to the armature 3 and has a key-shaped extending portion extending in a direction perpendicular to the axial direction of the forceps shaft portion 32 so that foreign matter can be attracted.

The forceps shaft portion 32 is a hollow closely coiled coil 3.
A wire 36 is inserted into the hollow portion of the wire 5. The wire 36 is inserted into a wire fixing recess 37 formed in a hook stopper 33 having a substantially cylindrical shape attached to the tip of the forceps shaft portion 32.
The ends are fitted and brazed (this brazed portion is indicated by reference numeral 39) in a lateral hole 38 formed in the hook stopper 33 made of stainless steel (leading to the recess 37) and fixed. In addition, the front end of the close-wound coil 35 is also hooked 3
3 is brazed and fixed to the hook stopper 33 at a lateral hole 41 portion formed in the pipe 40 fitted externally from the rear end stepped portion to the front end outer periphery of the tightly wound coil 35. still,
The material of the wire 36 and the tightly wound coil 35 is also stainless steel.

The other end (rear end) of the wire 36 is
The wire 36 is passed through a center hole formed in the substantially columnar shaft-shaped fixing member 42, and is brazed and fixed at the lateral hole 43 formed in the side portion. Also, the rear end of the close-wound coil 35 is fixed to the rear end of the coil and the outer peripheral surface of the front end of the shaft fixing member 42 by fitting the pipe 44 outside and brazing at the opening 45 formed in the central portion thereof. There is. There is a notch 46 that is flatly cut out on the outer periphery near the rear end of the shaft fixing member 42.

In order to detachably connect the hook portion 31 to the front end side of the hook stopper 33, and the hook portion 31.
Male screw 4 also used to form female screw for connection to
7 is formed. This male screw 47 is a hook stop 33.
Male screw 47 with small threads formed on the outer peripheral surface of the front end of
a and a second male screw 47b having a slightly larger diameter and a slightly larger thread at the rear portion thereof. On the other hand, the hook portion 31 detachably attachable to the male screw 47 has an L shape made of aluminum and has a spherical tip end.

Further, at the base (rear end) of the hook portion 31, there is formed a concave portion 48 having an inner diameter capable of forming a female screw to be screwed into the male screw 47 of the hook stopper 33. The concave portion 48 has a first concave portion 48a having an outer diameter obtained by subtracting the thread of the first male screw 47a from the inner diameter d1 thereof, and the first concave portion 48a.
The second recessed portion 4 formed adjacent to a and having an outer diameter obtained by subtracting the thread portion of the second male screw 47b is approximately the inner diameter d2.
8b and.

The hook portion 31 is pressed against the hook stopper 33, and the hook stopper 33 is fitted into the first recess 48a of the hook portion 31.
With the first male screw 47a at the tip end of the first abutment rotated, the hook portion 31 is rotated while being pushed, so that the first male screw 4 is attached to the inner wall surface of the first recess 48a as shown in FIG.
7a is formed with a male screw 49a, and subsequently, even when the second male screw 47b abuts the second recess 48b, the male screw 47b is screwed into the inner wall surface of the second recess 48b to be screwed into the second male screw 47b. 49b is formed, and by this self-tapping, the female screw 4
9a and 49b are formed, and the hook portion 31 is fixed to the hook stopper 33 by screwing at that time.

When the hook forceps 26 are inserted into the channel 25, the hook portion 31 projects from the outlet of the channel 25 as shown in FIG. By accommodating the hook portion 31 in the groove 30 of the protrusion 29, the foreign substance can be collected on the protrusion 29 while holding the foreign substance on the protrusion 29 and preventing the foreign substance from falling off.

As shown in FIG. 4, the shape of the groove 30 is such that the width of the groove 30 is wider than the outer diameter of the tip of the hook portion 31 even at the narrowest portion, and becomes wider toward the tip. When the tip of the hook portion 31 is housed in the groove 30, the observation optical system 28 and the outlet of the channel 25 are arranged so that the field of view of the observation optical system 28 is not blocked by the hook portion 31. The groove 30 is arranged. The field of view when looking through the eyepiece 23 is as shown in FIG.
As shown in FIG.
And become slightly visible.

As shown in FIG. 1, the proximal side of the hook forceps 26 extends to the outside from the forceps introduction port 50, and a grip 51 is detachably fixed to the rear end as shown in FIG.

A hole 52 is formed inside from the base end side to the end side of the grip 51, and the shaft portion fixing member 42 at the rear end portion of the hook forceps 51 is fitted into the hole 52. The grip 51 has a screw hole 5 communicating with the hole 52.
3 is provided on the side portion, and a fixing screw 54 is screwed into the screw hole 53. The flat tip of the screw 54 presses the flat surface of the notch 46 of the shaft fixing member 42,
The grip 51 and the rear end of the hook forceps 26 can be fixed to each other.

To attach the hook forceps 26 to the industrial endoscope 20 as shown in FIG. 1, the forceps shaft portion 32 on the proximal side of the hook forceps 26 having the hook portion 31 attached to the tip thereof is inserted into the insertion portion 2.
1 Insert into the outlet of the channel 25 at the tip, and the rear end of the inserted forceps shaft portion 32 is projected from the forceps inlet 50. The grip 51 shown in FIG. 6 can be attached to the projected rear end portion, and when this attachment is performed, the state shown in FIG. 1 is obtained.

In the industrial endoscope 20 of the first embodiment constructed as described above, the hook portion 31 attached to the tip of the forceps shaft portion 32 of the hook forceps 26 inserted into the channel 25 is moved in the axial direction of the channel 25. It is possible to collect the foreign matter, and when collecting the foreign matter, the protruding hook portion 31 is pulled toward the tip end side of the endoscope 20 to hold the foreign matter on the projection 29 and collect the foreign matter.

Hereinafter, the operation of collecting foreign matter by the industrial endoscope 20 will be specifically described with reference to FIG. Figure 7
As shown in (a), there is a hook portion 31 of the hook forceps 26 near the distal end surface of the insertion portion 21, and the wedge-shaped projection 2
With the tip of the hook portion 31 housed in the groove 30 of 9, the scope tip is brought closer to the foreign matter 55. At that time, the outer periphery of the protrusion 29 is made to coincide with the surface on which the foreign matter 55 is falling.

Next, by rotating or advancing and retracting the grip 51 on the proximal side of the hook forceps 26, the forceps shaft portion 32 is operated to move the hook portion 31 to the foreign object 5 as shown in FIG. 7B.
Move to a position beyond 5 After the hook portion 31 has passed the foreign matter 55, the hook portion 31 is observed while observing the observation image.
Of the groove 30 is on the extension line of the groove 30 in the axial direction.

Next, pull the grip 51 toward the hand side, and as shown in FIG.
As shown in (c), the hook portion 31 is moved toward the distal end side of the scope, and the foreign matter 5 is moved by the hook portion 31.
Pull to collect 5. When the hook portion 31 is moved, the foreign matter 55 hooked on the hook portion 31 is not attached to the protrusion 2
9 and is finally sandwiched between the distal end surface of the insertion portion 21 and the hook portion 31 to be held in a state in which it is prevented from falling off. At this time, as shown in FIG.
Even if the positional relationship between the tip of the hook and the groove 30 is not correct, if the hook portion 31 is pulled toward the hand side, the tip of the hook portion 31 will be in the groove 30.
While making contact with the side surface of the groove 30, the groove 30 always reaches the narrowest place. Therefore, the hook portion 31 is always stored in a fixed position with respect to the protrusion 29, and in this state, the foreign matter is reliably positioned. At this time, the hook portion 3
The field of view is not obstructed by the circumferential portion of 1. Therefore, by pulling out the endoscope 20, the foreign matter 55 can be collected without falling off.

The first embodiment has the following effects. (1) Since the foreign matter is attracted to be grasped and collected, there is no possibility that the foreign matter escapes and cannot be collected during grasping unlike the three-claw forceps or the basket forceps. (2) Further, since the clearance between the tip surface of the insertion portion and the circumferential portion of the hook portion 31 is small, it is possible to collect foreign matters of various sizes. (3) Furthermore, since the position of the circumferential portion of the hook portion 31 with respect to the distal end surface of the insertion portion is determined by the groove 30 of the protrusion 29,
The hook portion 31 does not significantly obstruct the visual field when collecting foreign matter.

In this embodiment, the hook portion 31 is detachably attached to the hook stopper 33.
3 and the hook portion 31 may be integrally formed of a stainless material or the like. This has the effect of preventing the hook portion from falling off due to abrupt damage to the attachment portion between the hook stopper and the hook portion. Further, the hook portion 56 shown in FIG. 8 may be used instead of the hook portion 31 in the first embodiment. The hook portion 56 has its tip end side with respect to the base end side.
Instead of extending in a straight line in the perpendicular direction, it is configured to extend in a substantially arc shape.

FIG. 9 shows the distal end side of the insertion portion according to the second embodiment of the present invention. As shown in FIG. 9, a projection 58 is formed on the distal end surface 57 of the insertion portion, and a hook 59 is projected from the outlet of the channel 25. In this embodiment, a wedge-shaped protruding portion 58 having a notched tip is provided on the distal end surface 57 of the insertion portion, and is inserted into the channel 25 outlet. A hook 59 having a bifurcated tip is attached to the tip of a forceps shaft (not shown).

The width of the protrusion 58 is narrower than the distance between the tips of the two forks of the hook portion 59, and is tapered toward the tip of the protrusion 58. Then, as in the first embodiment, only the tip of the protruding portion 58 can be seen in the visual field. The thickness of the protrusion 58 is gradually reduced toward the tip. Other configurations are the endoscope 20.
And the hook forceps 26.

The operation of the second embodiment will be described below.
The hook portion 59 is attached to the tip surface 57 of the insertion portion such that the protrusion 58 is sandwiched between the tips of the two-forked hooks. When collecting the foreign matter, the outer peripheral surface of the protrusion 58 is made to be the same as the surface on which the foreign matter is falling, and the tip surface 57 of the insertion portion is brought close to the foreign matter.

The action of attracting a foreign substance (like a knuckle) by the hook portion 59 is the same as that of the first embodiment. In this case, the hook portion 59 is accommodated in the insertion portion distal end surface 57 while the foreign matter is attracted by using the tapered protrusion 58 as a guide, and holds the foreign matter between the hook portion 59 and the insertion portion distal end surface 57. Similar to the first embodiment, the hook portion 59 guides the protruding portion 58 as a guide to collect foreign matter while confirming the foreign matter with an observation image. At this time, the hook portion 59 does not significantly obstruct the visual field. The second embodiment has the same effect as the first embodiment, and the foreign matter can be collected more reliably than the first embodiment.

In the above-mentioned embodiment, the hook shape is shown in FIG. 2 in the first embodiment, FIG. 8 in the modification thereof, and FIG. 9 in the second embodiment, respectively. , The inside of the inserted part, etc.) Various hook shapes may be used (either self-tapping type or integral type is possible). For example, as the shape of the hook portion, as shown in FIGS.
Hook-shaped hook portions 31a and 3 respectively shown in (c)
You may make it like 1b, 31c.

FIG. 11 shows the structure of the tip side of the third embodiment of the present invention. In the third embodiment, the hook forceps 61 includes a flexible elongated forceps shaft portion 62 and a hook portion 64 that can be detachably attached to a hook stopper 63 formed at the tip of the forceps shaft portion 62. ..

In the forceps shaft portion 62, the wire 66 is inserted into the hollow portion of the hollow tightly wound coil 65. The wire 66 has an end fitted into a wire fixing recess 67 formed in a hook stopper 63 attached to the tip of the forceps shaft portion 62, and brazed by a horizontal hole 68 formed in the hook stopper 63.
9 and fixed. Further, the end of the close-wound coil 65 is also fitted into the coil fixing recess 70 formed adjacent to the wire fixing recess 67 in the inner diameter of the hook stopper 63 and fixed by brazing. Also, the forceps shaft portion 62
The rear end (not shown) is the same as that of the first embodiment, and the grip 51 of the first embodiment is attached.

The hook portion 6 is provided on the tip side of the hook stopper 63.
A male screw 71 is formed which is also used for detachably connecting 4 and for forming a female screw for connection on the hook portion 64. The configuration of the male screw 71 is the same as that of the male screw 47 of the first embodiment. A large diameter portion 72 having an outer diameter larger than that of the front end is provided at the rear end portion of the hook stopper 63.

Further, a hexagonal portion 73 having a hexagonal cross section is provided in an intermediate portion between the large diameter portion 72 and the male screw 71.
The L-shaped hook portion 64, which is the same as in the first embodiment, is detachably attached to the male screw 71. The hook forceps 61
The industrial endoscope 74 of the third embodiment through which the forceps biasing means 76 is attached to the outlet of the channel 25 of the industrial endoscope 20 of the first embodiment. The forceps urging means 76 has a rear base 77 on the inner diameter of the rear end of a hollow spring 75,
The front caps 78 are fixed to the inner diameters of the tips.

The outer diameter portion of the hollow rear mouthpiece 77, to which the spring 75 is not fitted, is the maximum outer diameter portion 79.
A first hole 80 and a second hole 81 are formed adjacent to each other in the inner diameter of the hollow front mouthpiece 78. The large diameter portion 72 of the hook stopper 63 is fitted into the first hole 80.
A portion of the hook stopper 63 on the tip side of the large diameter portion 72 is inserted into the second hole 81.

The end surface of the large-diameter portion 72 of the hook stopper 63 abuts on the step between the first hole 80 and the second hole 81. The hook forceps 61 is rotatable with respect to the forceps urging means 76. A forceps urging means insertion hole 82 is formed in the endoscope 74, and the maximum outer diameter portion 79 of the rear base 77 is fitted into the inner diameter of the hole 82. A female screw 83 is formed at the tip of the forceps urging means insertion hole 82. A rear end of the fixing sleeve 85 fixes the forceps urging means 76 to the endoscope 74 by screwing a substantially cylindrical fixing sleeve 85 having a male screw 84 that can be screwed into the female screw 83 onto the female screw 83.

Incidentally, on the hand side of the forceps urging means 76,
Similar to the first embodiment, a tube is provided which forms a channel 86 continuing to an operation unit (not shown). To attach the hook forceps 61 to the endoscope 74, the distal end side of the forceps shaft portion 62 is inserted through a channel introduction port (not shown) on the operation portion side (at this time, the hook portion 64 is not attached). Then, the forceps shaft portion 6 that has reached the tip of the endoscope 74.
The hook stopper 63 at the tip of 2 is inserted through the hollow portions of the rear cap 77 and the spring 75.

The large diameter portion 72 of the hook stopper 63 is fitted into the first hole 80 of the front mouthpiece 78, and the tip of the large diameter portion 72 is inserted into the second hole 81 of the front mouthpiece 78. The hook stopper 63 hits the front cap 78. Therefore, the hook portion 64 is attached to the male screw 71 at the tip of the hook stopper 63 by using the self-tapping method as in the first embodiment. At this time, the forceps urging means 76 is extended in the axial direction in order to pull out the hook stopper 63 slightly protruding from the distal end of the endoscope 74 in the axial direction so that the projection 87 does not get in the way, and then the hook portion 64 is attached. .. When installing the hook 64,
The work can be easily performed by putting a small spanner on the hexagonal portion 73.

When the hook portion 64 is completely attached to the forceps shaft portion 62, the forceps urging means 76 that has been extended is returned to its original state. Then, the tip of the hook portion 64 is the groove 8 of the protrusion 87, as in the first embodiment.
It is stored in 8. Next, the operation of this embodiment will be described.

Similar to the first embodiment, the hook portion 64 is provided in the groove 88.
The endoscope 74 is brought close to a foreign substance while the tip of the endoscope is stored.
At this time, the outer periphery of the protrusion 87 is made to coincide with the surface on which the foreign matter is falling. Next, as in the first embodiment, the forceps shaft portion 62.
The hook portion 64 is made to pass over the foreign matter by the forward / backward / reverse operation (not shown) on the proximal side.

The front mouthpiece 78 of the forceps urging means 76 is pushed by the hook stopper 63 by pushing the forceps shaft portion 62 toward the distal end in the axial direction. Then, the spring 75 receives the force and extends in the axial direction. Therefore, the hook portion 64 moves in the axial direction. As the spring 75 extends, the restoring force of the spring 75 always acts on the hook stopper 63 as a biasing force. Other functions of recovery are the same as in the first embodiment.

Even after the collection, if the spring is extended, the urging force continues to act, so if a foreign object is caught,
The foreign matter receives the biasing force of the hook. The third embodiment has the following effects in addition to the effects of the first embodiment.

In the first and second embodiments, after the foreign matter is collected, the forceps shaft must be pulled to the hand side so that the collected foreign matter does not fall off until the endoscope tip is pulled out from the duct or the like. However, in this embodiment, since the urging force of the spring holds the foreign matter after the collection, it is not necessary to pull out the forceps shaft portion while pulling it toward the hand side, and the collection work can be performed easily and surely.

FIG. 12 shows the structure on the tip side of the fourth embodiment of the present invention. The endoscope 101 is detachably connected to an endoscope main body 102 and a distal end of the endoscope main body 102 by a screwing mechanism, and an optical adapter 10 for converting a viewing angle or a viewing direction.
3 and hook forceps 26 attached to them.

The optical adapter 103 has an outlet 105 for the channel 104 on the end face and an illumination optical system 106.
The observation optical system 107 and a wedge-shaped protrusion 29 with a notched tip forming a foreign matter receiving portion for receiving the foreign matter collected by the hook forceps 26 are formed. This wedge-shaped protrusion 29
Has the same structure as, for example, the first embodiment.

A part of the distal end surface of the endoscope body 102 is cut out (not rotationally symmetrical) to form a notched portion, and the deformed distal end surface is fitted to the optical adapter 103 side. A concave portion (not shown) is formed. By fitting in the concave portion, the illumination optical system 106 and the observation optical system 107 on the optical adapter 103 side are separated from each other in the endoscope main body 1
The optical axes of the illumination optical system 108 on the 02 side and the observation optical system 109 coincide with each other.

A male screw portion 110 is formed on the outer periphery of the endoscope body 102 near the distal end thereof.
0 is screwed with a female screw portion (not shown) formed on the inner peripheral surface of the connection ring 111 provided on the optical adapter 103. The channel 104 extends along the insertion portion 112 of the endoscope main body 102 and is fixed by fixing bands 113 provided at a plurality of positions of the insertion portion 112. The channel 104 extends from the outlet 105 to the forceps inlet of the operation unit.

The operation of this embodiment will be described below. The endoscope body 1 is connected in the same manner as when connecting the optical adapter 103 to which the channel 104 is connected to a normal optical adapter.
Connect to 02. Next, the channel 104 is fixed to the endoscope main body 102 using the fixing band 113. further,
The hook forceps 26 is inserted into the channel 104. Other functions are the same as those in the first embodiment.

According to this embodiment, an existing endoscope can be used. When it is not necessary to collect foreign matter, it can be detached and used as a normal endoscope. Further, even when the type or shape of the foreign matter is different, if an adapter having a different shape of the protrusion 29 is prepared, the foreign matter can be easily collected only by exchanging the adapter. Other effects are the same as those of the first embodiment.

FIG. 13 shows the structure on the tip side of the fifth embodiment of the present invention. The endoscope 121 is detachably connected to an endoscope main body 123 having a channel 122 formed therein and a distal end of the endoscope main body 123 by a screwing mechanism.
An optical adapter 125 for changing the viewing angle and viewing direction, and a hook forceps 26 attached thereto are provided.

This embodiment has a structure in which the channel 104 is formed in the insertion portion 112 of the endoscope main body 102 in the fourth embodiment. Therefore, the fixing band 113 is not necessary. The other structure is similar to that of the fourth embodiment, and the same members are designated by the same reference numerals.

The operation of this embodiment will be described below. The optical adapter 125 is connected to the endoscope body 123. The hook forceps 26 is inserted through the channel 122 formed in the endoscope main body 123 and the outlet port 124 corresponding to the end thereof. Other functions are the same as those in the first embodiment.

According to this embodiment, an ordinary endoscope with a channel can be used. If it is not necessary to collect foreign matter, an ordinary optical adapter may be attached and used.
Other effects are similar to those of the fourth embodiment.

FIG. 14 shows a modification of the fourth embodiment in use. In this modification, the wedge-shaped protrusions 2 attached to the optical adapter 103 are formed by an elastic member.
It is composed of 9 '. Further, in FIG. 14, the wire of the hook forceps 26 is passed through the lead-out port, but the wire may be inserted through the channel 104 as shown in FIG.

When the endoscope insertion portion 112 has an angle with respect to the surface 126 on which the foreign matter 55 has fallen, the projection 29 ′ is pushed along the surface 126 by pressing the tip of the endoscope against the surface 126. Deform. Since the wire of the hook forceps 26 is also an elastic member composed of a tightly wound coil, it can be pressed against the surface 126 and bent. Accordingly, no matter what angle the insertion portion 112 has with respect to the surface 126, the projection 29 ′ has a portion parallel to the surface 126, and the foreign matter 55 can be smoothly drawn into the projection 29 ′. Therefore, foreign matter can be easily collected. Although FIG. 14 has been described as a modification of the embodiment of FIG. 12, it can also be applied to the embodiment of FIG.

FIGS. 15 and 16 show the structure on the tip side of the sixth embodiment of the present invention. This endoscope 131 is a side-view type, and an optical adapter 133 is detachably connected to an endoscope main body 132 with a built-in channel by a screwing mechanism. The optical adapter 133 has a flat surface portion 134 on the side surface.
At 34, an objective optical system 135 and an illumination optical system 136 are formed.

Further, the endoscope main body 1 is attached to the optical adapter 133.
A channel 137 is formed from a position corresponding to the channel outlet of 32 to the tip surface of the optical adapter 133.
This channel 137 is formed on the flat surface 134 by
A groove 138 is formed so as to open along the longitudinal direction of 37, and the width of this groove 138 is made larger than the hook width of the hook forceps 26.

Further, a projecting portion 139 is formed at a rear end of the flat portion 134 in a direction substantially perpendicular to the axial direction, and a tip end thereof is provided with a bent portion 140 bent in the axial direction. The bent portion 140 has the same structure as the protrusion 29. Next, the operation will be described.

The optical adapter 133 can be attached and the hook forceps 26 can be inserted in the same manner as in the fifth embodiment.
When collecting the foreign matter, the hook forceps 26 is pulled toward the hand side, and at that time, the hook forceps 26 are aligned in such a direction as to pass through the groove 138 of the flat surface portion 134 (indicated by an arrow in FIG. 15). Other effects are first
Same as the embodiment. According to this embodiment, by attaching the optical adapter 133, the endoscope can be used in a side view. Further, foreign matter can be collected even in a place that cannot be observed by direct sight or a place that is difficult to approach.

17 and 18 show the front end side of the seventh embodiment of the present invention. The endoscope 141 has an objective optical system 142, illumination optical systems 143 and 143, a channel outlet 144, and a protrusion 29 formed on the distal end surface. The objective optical system 142 and the illumination optical systems 143, 143 are surrounded by ring-shaped convex portions 145 protruding from the tip end surface.

When the foreign matter 147 is pressed to the tip side by the hook forceps 26 to collect the foreign matter as shown in FIG. 18, the foreign matter is removed by the convex portion 145.
42 or the lens surface of the illumination optical system 143 is prevented. Therefore, it is possible to prevent the lens surface from being damaged by the foreign matter. The convex portion 145 is not limited to being provided over the entire circumference of the lens surface,
It may be provided in a part thereof, or convex portions may be formed periodically in the circumferential direction.

FIG. 19 shows a modification of the hook forceps. Figure 9
Since the two hooks as shown in (1) increase the obstruction of the visual field during insertion and observation, this is an improvement. The hook forceps 151 has a double structure of an outer hook 152 and an inner movable hook 153. Outer hook 15
2 is provided with a cutout portion 154, and the cutout portion 154 is sized to fit the inner movable hook 153. The movable hook 153 is inserted inside the outer hook 152, and can rotate and move back and forth with respect to the outer hook 152.

When the endoscope is inserted and observed, the outer hook 152 and the movable hook 153 are closed and overlapped as shown in FIG. 19 (a). Movable hook 153 at the time of collection
Rotate in the direction of the cutout 154, pull it toward your hand,
It fits in the notch 154 and is made as shown in FIG. In this state, it can be used as shown in FIG.

The present invention can also be applied to an electronic endoscope having a built-in CCD or the like. Further, the protrusion 29, the protrusion 58 and the like may be detachably attached to the distal end surface of the insertion portion with a screw or the like. In this way, it can be applied to an existing endoscope, for example. Further, when it is not necessary to collect the foreign matter, it can be detached and used as a normal endoscope.

[0073]

As described above, according to the present invention, a hook forceps having a hook portion for catching and moving a foreign substance at the tip of the shaft portion inserted into the channel, and the tip of the endoscope. Since a hook has a guide mechanism for the hook portion and a receiving portion that can hold the foreign matter moved by the hook forceps without falling off with the hook portion, it is easy to move the foreign matter to the receiving portion. Besides, it is possible to collect foreign matters of various sizes.

[Brief description of drawings]

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

FIG. 2 is a sectional view showing the structure of a hook forceps that constitutes the first embodiment.

FIG. 3 is a cross-sectional view showing a portion in which a hook portion is attached to a forceps shaft portion.

FIG. 4 is a bottom view showing a protrusion and a groove formed on the front end surface of the insertion portion.

FIG. 5 is an explanatory view showing an observation image in a state where a foreign matter is collected and held.

FIG. 6 is a cross-sectional view showing the structure of the grip of the hook forceps.

FIG. 7 is an explanatory view of the operation of collecting foreign matter according to the first embodiment.

FIG. 8 is a side view showing a shape of a hook portion in a modified example of the first embodiment.

FIG. 9 is a perspective view of the distal end side of the insertion portion according to the second embodiment of the present invention.

FIG. 10 is a perspective view showing a hook shape in a modified example of the second embodiment.

FIG. 11 is a cross-sectional view showing the structure of the main part on the distal end side of the insertion part in the third embodiment of the invention.

FIG. 12 is a perspective view showing the structure of the main part on the distal end side of the insertion part according to the fourth embodiment of the present invention.

FIG. 13 is a perspective view showing the structure of the main part on the distal end side of the insertion part according to the fifth embodiment of the present invention.

FIG. 14 is a perspective view showing the structure of the main part on the distal end side of the insertion part in a modification of the fourth embodiment of the present invention.

FIG. 15 is a perspective view showing the structure of the main part on the distal end side of the insertion part according to the sixth embodiment of the present invention.

FIG. 16 is a perspective view showing how the hook is moved along the groove in the sixth embodiment.

FIG. 17 is a perspective view showing the structure of the main part on the distal end side of the insertion part according to the seventh embodiment of the present invention.

FIG. 18 is a side view showing a part of FIG. 17 by cutting out.

FIG. 19 is a perspective view showing another embodiment of the hook forceps.

FIG. 20 is a cross-sectional view showing an example of a foreign matter collecting forceps in a conventional example.

FIG. 21 is a cross-sectional view showing another example of the foreign matter collecting forceps in the conventional example.

[Explanation of symbols]

 20 ... Industrial endoscope 21 ... Insertion part 25 ... Channel 26 ... Hook forceps 27 ... Illumination optical system 28 ... Observation optical system 29 ... Protrusion 30 ... Groove 31 ... Hook part 32 ... Forceps shaft part 55 ... Foreign matter

Claims (1)

[Claims] 1. An industrial endoscope having a channel for collecting foreign matter, comprising hook forceps comprising an elongated forceps shaft portion inserted through the channel and a hook portion formed at a tip of the forceps shaft portion. An industrial endoscope for collecting foreign matter, comprising: a foreign matter receiving portion formed at a distal end portion of the insertion portion of the industrial endoscope and provided with a guide mechanism for the hook portion.