JP4109031B2 - Endoscope device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope apparatus including a bending portion on a distal end side of a long insertion portion.
[0002]
[Prior art]
In general, an endoscope applicable for industrial use and medical use is provided with a long insertion portion to be inserted into a lumen. In this type of endoscope, a bending portion is provided on the distal end side of the insertion portion, and the bending direction of the bending portion allows the observation direction of the endoscope to be directed in an arbitrary direction.
[0003]
For example, when inserting the insertion part of an industrial endoscope deeply into a torsional thick pipe having a plurality of elbow parts, there is a large dimensional difference between the inner diameter of the pipe and the outer diameter of the insertion part. When the push-in operation is performed, the flexible tube portion is greatly bent, and it is difficult to insert the insertion portion into the target portion with good skill. Therefore, in consideration of insertion workability, it is desirable to newly prepare endoscopes having an insertion portion having an optimum outer diameter with respect to the inner diameter of the tube.
[0004]
[Problems to be solved by the invention]
However, the endoscope itself is an expensive product. For this reason, there arises a problem that the cost burden increases for the user by newly arranging endoscopes having an insertion portion having an outer diameter optimum for the inner diameter of the tube.
[0005]
The present invention has been made in view of the above circumstances, and the insertion portion can be quickly moved deeply into a pipe having a large dimensional difference between the inner diameter of the tube and the outer diameter of the insertion portion and having a plurality of elbow portions. An object of the present invention is to provide an inexpensive endoscope apparatus that can be inserted into a monitor for observation.
[0006]
[Means for Solving the Problems]
An endoscope apparatus according to the present invention includes an observation optical system and an illumination optical system at a distal end portion of an elongated insertion portion, and an endoscope having a curved portion connected to the distal end portion, a length dimension, an outer diameter dimension, inner diameter of the guide holes constituting the guide path for inserting the insertion portion of the endoscope to the target observation region is positioned at the distal end of the plurality of different tubular members, and small without even one tubular member by the guide hole An insertion portion guide member having an insertion direction conversion hole for converting the traveling direction of the configured guide path from the axial direction of the tubular member to the side, and the plurality of tubular members have a long length. Accordingly, the outer diameter dimension and the inner diameter dimension of the guide hole are set to be smaller, and the other tubular member inserted into the guide hole of one tubular member protrudes from the insertion direction changing hole.
[0007]
Then, the insertion direction changing hole is previously end cover member formed with an opening in the side surface portion.
[0009]
According to these configurations, when an observation target site deep in a pipe having a plurality of elbow parts is observed with an endoscope, first, a first tubular member having a direction switching means is inserted along the pipe. To go. When the distal end side of the tubular member reaches the target elbow part, the direction of the guide path is made to coincide with the pipe back direction.
[0010]
Next, a second tubular member having a smaller diameter than the first tubular member and provided with a direction switching means is inserted into the guide path of the first tubular member. And if this 2nd tubular member protrudes from the direction switching means provided in the 1st tubular member, the 2nd protruding tubular member will be pushed deeply along the piping. When the distal end side of the second tubular member reaches the target elbow part, the direction of the guide path is turned to the pipe back direction.
[0011]
Then, this operation is repeated. Then, an insertion portion guide member configured by inserting a plurality of tubular members near the observation target site is arranged. In this state, the insertion portion of the endoscope is inserted into the guide path of the tubular member inserted last in the insertion portion guide member. Then, a hand operation such as a bending operation is performed, the insertion portion is guided to the distal end side of the tubular member, and protrudes from the distal end portion, and subsequently, the insertion portion that protrudes from the tubular member while performing a hand operation such as the bending operation is performed. Push it further along the pipe. Thus, desired observation of the observation target site can be performed.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
1 to 9 relate to an embodiment of the present invention, FIG. 1 is a diagram for explaining the configuration of an endoscope apparatus, and FIG. 2 is a tubular member that constitutes an insertion portion guide member and a tip cover member that is a direction switching means. FIG. 3 is a diagram for explaining the operation of the insertion portion guide member, FIG. 4 is a diagram for explaining another example of the direction switching means, and FIG. 5 is a diagram for explaining another example of the direction switching means. 6 is a diagram for explaining another configuration of the tubular member, FIG. 7 is a diagram for explaining the tubular member provided with the balloon, FIG. 8 is a diagram for explaining the insertion portion guide member having a flat shape, and FIG. It is a figure explaining the front-end | tip cover member provided in a shape insertion part guide member.
[0013]
2A is a view of the tip cover member integrated with the tubular member when viewed from the front with the direction changing port facing, and FIG. 2B is a cross-sectional view taken along line AA in FIG. 2A. 5A is a diagram for explaining the tip cover member provided with the raising base, FIG. 5B is a diagram for explaining the action of the raising base, and FIG. 5C is a tubular member in which the tip cover is arranged. 6A and 6B are views for explaining the action of the used insertion portion guide member, FIG. 6A is a view showing a tubular member having a structure in which the insertion portion protrudes forward, and FIG. 6B is a coil sheath on the tubular member of FIG. FIG. 6C is a diagram for explaining an example of the action of the coil sheath, FIG. 6D is a figure for explaining another example of the action of the coil sheath, and FIG. FIG. 8A is a diagram for explaining the configuration and operation in which the coil sheath is integrally disposed on the tubular member on which the tip cover member is disposed. FIG. FIG. 8B shows a flat-shaped insertion portion guide member formed by covering a tube body with a blade, and FIG. 8B shows a flat-shaped insertion portion guide member formed by covering three tube bodies with a blade. FIG. 8 (c) is a view for explaining the action of the flat insertion portion guide member, FIG. 9 (a) is a perspective view for explaining the tip cover member, and FIG. 9 (b) is FIG. 9 (a). It is a BB sectional view taken on the line.
[0014]
As shown in FIG. 1, an endoscope apparatus 1 according to the present embodiment includes, for example, an industrial endoscope 2 provided with an elongated insertion portion 2a having flexibility, and the insertion portion 2a of the endoscope 2. A drum portion 3 wound around the outer peripheral surface portion 3a, a frame portion (not shown) that holds the drum portion 3 in a rotatable state, and various switches, connectors, and air supply / exhaust ducts are provided at the upper end of the frame portion. The arranged front panel 4, a remote controller (hereinafter referred to as a remote controller) 5 having an operation switch such as a joystick 5 a for performing a bending operation instruction that is detachably connected to the front panel 4 via a cable 5 a, and a telescopic pole A monitor 6 rotatably supported by 6a, a storage case 7 provided with a cushioning material or the like for suppressing the impact force applied to the equipment to be stored, and the front panel 4 are connected to a commercial power supply. And a plurality of tubular members 8a, 8b,... Having different flexibility, diameter dimensions, and length dimensions, which have an after-mentioned guide path for guiding the insertion portion 2a to the vicinity of the observation target site. The tip cover members 9a, 9b, and 9c serving as direction switching means for converting the insertion direction of the insertion portion into at least one of the tubular members 8a, 8b, and 8c. It is mainly comprised by the insertion part guide member 10 which fixedly installed. The storage case 7 includes a box 7a and a lid 7b that form a case body.
[0015]
The insertion portion 2a of the endoscope 2 extends from the front panel 4 through a rubber member 4b for preventing buckling. The insertion portion 2a includes a rigid distal end main body 11 in order from the distal end side, a bendable bending portion 12 configured by, for example, a fluid pressure actuator that directs the distal end main body 11 in a desired direction, and an elongated and flexible flexible. The pipe part 13 is connected and configured.
[0016]
In the internal space of the drum section 3, a light source section (not shown) that supplies illumination light to a light guide (not shown) that is an illumination transmission means of the endoscope 2, and a distal end main body of the endoscope insertion section 2a A CCU (not shown) that performs signal processing on an image sensor (not shown) provided in 11, a fluid pressure supply source 14 that supplies fluid to a fluid pressure actuator that drives the bending portion 12 of the endoscope insertion portion 2 a, and the like are accommodated. Has been.
[0017]
The fluid pressure supply source 14 includes a gas cylinder 15 filled with high-pressure gas, and a control section that controls the pressure of the gas cylinder 15 based on a bending instruction signal from the remote controller 5 to cause the bending section 12 to bend. The regulator 16 and the valve unit 17, a control board 18 that controls the valve unit 17, a tube 19 that extends from the valve unit 17 and supplies fluid to the fluid pressure actuator, and the like. The gas cylinder 15 is filled with incombustible gas such as carbon dioxide, chlorofluorocarbon, nitrogen, helium, argon, or nitrogen. Reference numeral 20 denotes a cylinder connecting portion to which the gas cylinder 15 is detachably connected.
[0018]
The tubular members 8a, 8b, and 8c constituting the insertion portion guide member 10 are different in flexibility, inner diameter, outer diameter, and length. The tip cover members 9a, 9b, 9c are fixed to the tip portions of predetermined tubular members 8a, 8b, 8c, for example, by bonding.
[0019]
As shown in FIGS. 2 (a) and 2 (b), the tubular members 8a, 8b,... Have a guide body 81a having a guide hole 81a which is a flexible, for example, PTEE-made through hole serving as a guide path. 81 and a blade 82 formed by weaving, for example, a stainless steel wire or thin plate material covering the exterior of the tube body 81. The flexibility of the tubular member is set to a predetermined state by adjusting the thickness of the tube body 81 and the strength of the blade 82.
[0020]
In this embodiment, the inner and outer diameter dimensions are made smaller in the order of the tubular members 8a, 8b,..., The length dimension is made longer in the order of the tubular members 8a, 8b,. It is set flexibly in the order of 8a, 8b,. The inner diameter dimension of the through hole and the outer diameter dimension of the tubular member inserted through the through hole are set so that the other tubular member and the insertion portion can be smoothly inserted through the through hole of the tubular member.
[0021]
On the other hand, the tip cover members 9a, 9b, 9c are formed, for example, in a resin cover main body 91 whose tip side is formed in a substantially hemispherical shape, with insertion direction changing holes 91a serving as guide paths communicating with the guide holes 81a. Configured. A communication port 92 which is one end side opening of the insertion direction changing hole 91 a is formed on the base end surface of the cover main body 91 so as to communicate with the guide hole 81 a, and the direction changing port 93 which is the other end side opening is formed on the cover main body 91. It is formed on the side.
[0022]
Therefore, by inserting the insertion portion 2a into the guide hole 81a, which is a guide path of the tubular member fixed with the tip cover, and pushing the insertion portion 2a forward, the insertion portion 2a is communicated with the cover main body 91 communicating with the guide hole 81a. 92 is led to the insertion direction changing hole 91 a and led out from the direction changing port 93.
Reference numeral 84 denotes an annular proximal end base that also serves as a gripping portion that is fitted and fixed to the proximal end portion of the tube body 81, and has an outer diameter dimension larger than the outer diameter of the tube body 81. Yes. Reference numeral 83 is a mark for notifying the user of the position of the direction changing port 93. Furthermore, in the present embodiment, the bending drive of the bending portion 12 is a fluid pressure actuator, but the bending drive of the bending portion 12 may be electrically performed.
[0023]
The operation of the endoscope apparatus 1 configured as described above will be described with reference to FIG.
As shown in the figure, for example, the insertion portion 2a of the endoscope 2 is inserted into a large-diameter pipe 31 having elbow portions 31a and 31b bent at two right angles to observe the vicinity of the main tube 30 which is a target observation site. First, the tubular member 8a having a length that reaches the first elbow part 31a with the distal end cover member 9a disposed at the distal end and the distal end cover member 9b disposed at the distal end is relatively comparative. A soft tubular member 8b having a length that reaches the second elbow portion 31b is prepared.
[0024]
Next, the tubular member 8 a to which the tip cover member 9 a is fixed is inserted into the pipe 31. Since this tubular member 8a is slightly hard, the tubular member 8a proceeds smoothly toward the first elbow portion 31a. Then, if it is confirmed that the distal end cover member 9a is positioned in the vicinity of the first elbow portion 31a, for example, by the distal end of the distal end cover member 9a coming into contact with the pipe, the proximal end base 84a is gripped to twist the tubular member 8a. To adjust the position of the mark 83a in a predetermined direction. As a result, the direction of the direction changing port 93a coincides with the depth direction of the pipe 31.
[0025]
Next, the tubular member 8b to which the tip cover member 9b is fixed is inserted into the guide hole 81a of the tubular member 8a. Then, the tubular member 8a protrudes from the direction changing port 93a through the guide hole 81a, the communication port 92a, the insertion direction changing hole 91a, and is led out into the pipe 31 near the first elbow portion 31a. Since the tubular member 8b is soft and flexible, it protrudes from the direction changing port 93a and then smoothly proceeds toward the second elbow portion 31b. Then, if it is confirmed that the distal end cover member 9b is positioned in the vicinity of the second elbow portion 31b by, for example, the distal end of the distal end cover member 9b coming into contact with the pipe, the proximal end base 84b is gripped to twist the tubular member 8b. To adjust the position of the mark 83b in a predetermined direction. As a result, the direction of the direction changing port 93 b matches the depth direction of the pipe 31.
[0026]
Next, the insertion portion 2a of the endoscope 2 is inserted into the guide hole 81a of the tubular member 8b. Then, the insertion portion 2a passes through the guide hole 81a, the communication port 92b, and the insertion direction changing hole 91a, protrudes from the direction changing port 93b, and is led out into the pipe 31 near the second elbow portion 31b. After the insertion portion 2a protrudes from the direction changing port 93b, the insertion portion 2a is pushed forward, and a hand operation such as a bending operation or a twisting operation is performed to observe the inside of the pipe 31.
[0027]
As described above, after the endoscope apparatus is provided with the insertion portion guide member composed of a plurality of tubular members and the tip cover member, the insertion portion guide member is inserted and arranged in the vicinity of the observation target site such as a pipe in advance. By inserting the insertion portion into the guide path of the insertion portion guide member, the insertion portion can be smoothly led to the vicinity of the target observation site for observation.
[0028]
Here, another configuration example of the direction switching means will be described with reference to FIG.
In the above-described embodiment, the direction switching means is fixed to the distal end portion of the tube body 81, and the tip cover member is formed with the direction changing port 93 that is a side opening. However, the direction switching means is limited to this tip cover member. 4A, an annular tip cap member 85 disposed at the tip of the tube body 81 having a guide hole 81a constituting the tubular member 8a as shown in FIG. For example, the base end portion may be configured by, for example, an operation wire 87 made of stainless steel that extends through the inside of the coil sheath 86 and extends in the base end direction on the hand side.
[0029]
Here, reference numeral 87 a is a fixing member fixed to the distal end portion of the operation wire 87, and this fixing member 87 a is joined to a predetermined position on the outer peripheral surface of the distal end cap member 85. Reference numeral 86 a denotes a fixing member fixed to the distal end portion of the coil sheath 86, and the fixing member 86 a is joined to a predetermined position of the blade 82 covered with the tube body 81.
[0030]
As a result, as shown in FIG. 4B, the user pulls the operation wire 87 as appropriate, and the distal end portion of the tube body 81 is bent by a desired amount, thereby obtaining the same operation and effect as described above. Can do.
[0031]
As shown in FIG. 5A, the insertion direction conversion hole 91a is led out from the insertion direction conversion hole 91a into the insertion direction conversion hole 91a of the distal end cover member 9 arranged at the distal end portion of the tubular member 8 constituting the insertion portion guide member 10. The derivation direction adjusting means 50 for appropriately adjusting the derivation direction of the tubular member 8 or the insertion portion 2a may be provided.
[0032]
The lead-out direction adjusting means 50 is mainly composed of an elevator 51 disposed at the distal end of the insertion direction changing hole 91a, and a distal end fixed to a wire fixing portion 51a provided on the elevator 51. Is constituted by an operation wire 52 extending to the hand side. The elevator 51 is pivotally supported by a pivot shaft 53 at a predetermined position of the insertion direction changing hole 91a. On the other hand, the wire 52 is inserted into the coil sheath 54 disposed on the outer peripheral surface of the blade 82 constituting the tubular member 8. The coil sheath 54 is integrally disposed on the outer peripheral surface side of the tubular member 8 by a blade 55. The coil sheath 54 may be disposed between the tube body 81 and the blade 82 constituting the tubular member 8.
[0033]
With this configuration, as shown in FIG. 5B, when the user appropriately pulls the operation wire 52, the elevator base 51 disposed in the insertion direction changing hole 91a of the tip cover member 9 is raised by a predetermined amount. In addition, as shown by an arrow, a solid line, and a broken line, the lead-out direction of the insertion portion 2a and the like protruding from the direction changing port 93 can be changed.
[0034]
As a result, the tip cover member provided with the raising base 51 and the operation wire 52 when performing inspection in the pipe where the main pipe line 31a and the branch pipe line 31p are branched in the depth direction of the elbow part 31n. The insertion member guide member 10 is configured so that the tubular member 8 to which the arm 9 is fixed is positioned in the vicinity of the elbow portion 31n, so that the raising portion 51 is appropriately raised as shown in FIG. The inspection can be reliably performed by guiding 2a to the main pipeline or the branch pipeline 31p.
[0035]
In the above-described embodiment, the configuration has been described in which the distal end cover member is arranged at the distal end portion of the tubular member and the insertion portion guided to the guide hole protrudes in the lateral direction. However, as shown in FIG. The insertion portion 2a guided through the guide hole 81a of the tubular member 8 may be configured to protrude forward instead of laterally. That is, you may make it prepare the tubular member which does not provide the direction switching means.
[0036]
In the case of this configuration, as shown in FIG. 6B, for example, a coil sheath 54 or a super elastic pipe may be disposed between the tube body 81 and the blade 82 constituting the tubular member 8. As a result, as shown in FIG. 6C, the insertion portion 2a of the endoscope 2 is inserted into the guide hole 81a, while a tool 61 such as a grinding tool or a gripping tool is inserted and disposed in the coil sheath 54. Repair work can be performed along with observation. In addition, as shown in FIG. 6D, the hook member 62 that stably holds the distal end portion of the tubular member 8 can be inserted into the coil sheath 54 to improve workability. Further, when the tip cover member 9 is disposed at the distal end portion of the tubular member 8 as shown in FIG. 6 (e), the coil sheath 54 is integrally disposed, for example, a tool such as a grinding tool. 61 can be used for repair work.
[0037]
Further, as shown in FIG. 7, a balloon 70 is provided in the middle of the tubular member 8d, and an air / liquid feeding tube 71 communicating with the balloon 70 is disposed between the tube body 81 and the blade 82. Good. As a result, the balloon 70 can be inflated via the air / liquid feeding tube 71, and the midway part of the tubular member 8 d can be stably fixed to the pipe 31. By holding in this state, the insertion portion 2a of the endoscope 2 and the like can be smoothly inserted through a guide hole (not shown) of the tubular member 8d, and an inspection of the middle portion of the pipe can be reliably performed.
[0038]
By the way, depending on the pipe to be inspected, there is a pipe whose cross-sectional shape is a flat shape (flat circle, ellipse, square, etc.), and the bending method is regularly changed (for example, stepped shape). In such a case, it is not necessary to form the cross-sectional shape of the tubular member in a circular shape. For example, the tubular member may be configured as a flat tubular member 8e as shown in FIGS. In that case, a plurality of tube bodies 81e having guide holes 81a through which the insertion portion 2a is smoothly inserted are prepared, and these tube bodies 81e are covered with the blades 82 to have a flat shape. The direction switching means is constituted by a tip cap member 85 and an operation wire 87 made of stainless steel, for example. The distal end portion of the operation wire 87 is fixed to the distal end cap member 85, and the proximal end portion extends through the coil sheath 86, for example, in the proximal direction, which is the proximal portion side.
[0039]
As a result, as shown in FIG. 8C, the insertion portion guide member 10 in which a plurality of tube bodies 81e are gathered together by the blade 82 in the pipe 31A having a flat cross-sectional shape that is regularly bent is displaced in the flat wide direction. It is smoothly inserted to the target site without any problems. And if the front-end | tip part arrives at the target site | part, the insertion part 2a will be inserted in the guide hole 81a of the tube body 81e of a desired arrangement position from the some tube body 81e. Thereby, the insertion portion 2a protrudes into the pipe 31A and can be observed with an endoscope.
[0040]
When the insertion guide member 10 having a flat shape is configured, a plurality of tube bodies 81e are covered with the blade 82 instead of configuring the direction switching means with the tip cap member 85 and the operation wire 87 as described above. For example, as shown in FIGS. 9 (a) and 9 (b), the direction change ports 98a, 98b, and 98c are connected to the distal end portion of the tubular member 8e formed flat in a flat manner. You may make it arrange | position the front-end | tip cover member 99 provided with two or more insertion direction conversion holes 91a provided in this.
[0041]
Thus, after the insertion portion guide member 10 is inserted to, for example, a branch portion (not shown), the insertion portion 2a is inserted into the tube body corresponding to the desired opening position to guide the insertion portion 2a to the desired branch pipe. Inspection can be performed.
[0042]
It should be noted that the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.
[0043]
[Appendix]
According to the embodiment of the present invention described in detail above, the following configuration can be obtained.
[0044]
(1) An endoscope having an observation optical system and an illumination optical system at a distal end portion of an elongated insertion portion, and having a curved portion connected to the distal end portion;
A drum portion in which an insertion portion of this endoscope is wound and a control portion for controlling the bending portion is disposed in a substantially central portion;
A support for rotatably holding the drum portion;
A plurality of tubular members, each of which has a guide path with a predetermined diameter through which the corresponding tubular member or the insertion portion smoothly passes, each formed with a predetermined flexibility and length, and at least one tubular member An insertion portion guide member provided with direction switching means for converting the traveling direction of the guide path to
An endoscope apparatus comprising:
[0045]
(2) The direction switching means includes an insertion direction conversion hole having an opening formed in a side surface portion, which is disposed at a distal end portion of the tubular member and changes the insertion direction of the insertion portion from the axial direction of the tubular member to the side of the tubular member. The endoscope apparatus according to appendix 1, which is a tip cover member having the endoscope.
[0046]
(3) In Supplementary Note 1, the direction switching means is composed of a base member disposed at a distal end portion of the tubular member and an operation wire having a distal end fixed to the base member and a proximal end portion extending to a proximal portion. The endoscope apparatus described.
[0047]
(4) Derivation direction adjusting means for adjusting a deriving direction of the insertion portion led out from the insertion direction changing hole is provided on the distal end cover member disposed at the distal end portion of the tubular member constituting the most distal end of the insertion portion guiding member. The endoscope apparatus according to Supplementary Note 2 provided.
[0048]
(5) The derivation direction adjusting means includes an elevator that is disposed at the distal end portion of the insertion direction changing hole of the distal end cover member, and an operation in which the distal end portion is fixed to the elevator platform and the proximal end portion extends to the proximal portion. The endoscope apparatus according to appendix 4, which is configured with a wire.
[0049]
(6) Supplementary note 3 or 3, wherein the tubular member is composed of a tube body and a blade covering the outer periphery of the tube body, and the operation wire is disposed between the tube body and the blade and extends to a hand portion. The endoscope apparatus according to appendix 5.
[0050]
【The invention's effect】
As described above, according to the present invention, the insertion portion is quickly inserted deeply into a pipe having a large dimensional difference between the inner diameter dimension of the tube and the outer diameter dimension of the insertion portion and having a plurality of elbow portions. Thus, it is possible to provide an inexpensive endoscope apparatus that can perform observation.
[Brief description of the drawings]
FIG. 1 is a view for explaining the configuration of an endoscope apparatus. FIG. 2 is a view for explaining a tubular member constituting an insertion portion guide member and a tip cover member as direction switching means. FIG. 4 is a diagram illustrating another configuration example of the direction switching means. FIG. 5 is a diagram illustrating another configuration example of the direction switching means. FIG. 6 is a diagram illustrating another configuration of the tubular member. FIG. 7 is a diagram illustrating a tubular member provided with a balloon. FIG. 8 is a diagram illustrating a flat-shaped insertion portion guide member. FIG. 9 is a front-end cover member provided on a flat-shaped insertion portion guide member. Figure [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Endoscope apparatus 2 ... Endoscope 2a ... Insertion part 8a, 8b, 8c ... Tubular member 9a, 9b, 9c ... Tip cover member 10 ... Insertion part guide member 93 ... Direction change port

Claims (3)

An endoscope having an observation optical system and an illumination optical system at the distal end portion of the elongated insertion portion, and having a curved portion connected to the distal end portion ;
Length, outer diameter and the endoscope of the plurality of tubular members which inner diameter is different in the guide holes constituting the guide path for inserting the insertion portion to a target observation region, and even without least one tubular member tip An insertion portion guide member having an insertion direction conversion hole that is disposed in the guide path and converts the traveling direction of the guide path constituted by the guide hole from the axial direction of the tubular member to the side ;
Equipped with,
The plurality of tubular members are other tubular members that are inserted into the guide hole of one tubular member with the outer diameter dimension and the inner diameter dimension of the guide hole being set smaller as the length dimension becomes longer. Protrudes from the insertion direction changing hole . The insertion direction changing hole endoscope apparatus according to claim 1, characterized in that the above end cover member formed with an opening in the side surface portion.   3. The derivation direction adjusting means for adjusting the derivation direction of the tubular member derived from the insertion direction conversion hole or the insertion portion is provided in the insertion direction conversion hole. The endoscope apparatus described in 1.

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