JP4953952B2 - Adjustment jig for assembling endoscope insertion portion and assembling method - Google Patents

Description

  The present invention relates to a method for assembling an insertion portion constituting an endoscope that is inserted into a body cavity and images and observes a living tissue.

  The endoscope includes a gripping part that is held by an operator and an insertion part that extends from the gripping part and is inserted into a body cavity during endoscopic observation. The insertion portion includes a distal end portion, a bending portion for changing the position of the distal end portion in the body cavity, and a rigid portion that is disposed between the distal end portion and the bending portion and that is provided with a member necessary for endoscopic observation. And a long flexible tube positioned between the bending portion and the gripping portion. The insertion portion of such an endoscope and a plurality of wires and members (hereinafter collectively referred to as constituent members) arranged in the insertion portion are very long. Generally, from the viewpoint of work efficiency, the insertion portion is assembled as follows. That is, first, a hard part, a curved part, and a flexible tube are joined together to form an outer shell. And the structural member containing a front-end | tip part is inserted from the hard part side, and is arrange | positioned inside an insertion part.

  However, a plurality of guide channels extending along the longitudinal direction are formed in the insertion portion from the flexible tube to the bending portion so as to insert an angle wire for realizing a bending operation by the gripping portion. . Therefore, when inserting a component from the rigid part side, sufficient care must be taken not to contact the guide channel and to prevent unnecessary external pressure such as twisting from being applied to the component by the guide channel. This places an unnecessary burden on the worker who performs the assembly, which may lead to a reduction in work efficiency.

  For this reason, in recent years, several methods for assembling an insertion portion have been proposed that can efficiently assemble the insertion portion in a short time without damaging the constituent members. The proposal is disclosed, for example, in Patent Document 1 below.

Japanese Patent Laid-Open No. 7-23902

  In Patent Document 1, the constituent members are focused by a substantially cylindrical focusing means. Then, the constituent member that is focused by the focusing means is inserted from the end face of the distal end portion and disposed inside the insertion portion.

  In the case of the assembling method as described in Patent Document 1, since the entire area of the constituent member is covered by the focusing means, the possibility that the constituent member interferes with the guide channel during the insertion process is reduced.

  However, in recent years, the performance of endoscopes has been improved, for example, by mounting a plurality of types of optical systems having different observation magnifications or different wavelength ranges of irradiation light. In the case of such a high-performance endoscope in recent years, the diameter of the constituent members inevitably increases. For this reason, in the method described in Patent Document 1, the thickness of the converging means may be a factor that hinders the diameter reduction of the insertion portion.

  Therefore, in view of the above circumstances, the present invention assembles an endoscope insertion portion that can be safely and easily disposed without damaging components inside the insertion portion while achieving a reduction in diameter of the insertion portion. It is an object of the present invention to provide an adjustment jig suitable for the above, and a method for assembling an endoscope insertion portion using the adjustment jig.

  In order to solve the above-described problems, an endoscope insertion portion assembling adjustment jig according to the present invention is a constituent member having a distal end portion of an insertion portion in a narrow tubular body that is an outer shell of the insertion portion of the endoscope. Is an adjustment jig used when inserting the outer shell, and has an inner diameter substantially equal to the outer diameter of the connecting pipe constituting the vicinity of one end of the outer shell, and can be divided into a plurality of parts by a cutting surface extending from the front end to the rear end. A hollow main body configured to extend from the main body by a predetermined amount along the axial direction of the main body, and guide means for guiding the constituent member into the insertion portion, and the main body is fitted to the connecting pipe In the state, the guiding means is inserted so as to guide the component member into the insertion portion while avoiding the position of the angle guide channel inside the thin tubular body.

  By configuring as described above, a state equivalent to the case where the angle guide channel of the bending portion is extended into the rigid portion can be created in a pseudo manner. Therefore, the constituent member can be inserted into the insertion portion in a state where the position of the guide can be accurately grasped. That is, it becomes possible to dispose the constituent member inside the insertion portion safely and easily.

  According to the adjustment jig for assembling the endoscope insertion portion described in claim 2, it is desirable that the guide means has a total length substantially equal to the total length of the connecting pipe in order to further increase the effectiveness. As a result, the angle guide channel in the bending portion and the rod-like portion disposed in the rigid portion can be substantially continuous, and the constituent members can be inserted more safely.

  According to the adjustment jig for assembling the endoscope insertion portion according to claim 3, the guide means arranges the rod-shaped portion extending from the main body along the axial direction of the main body with the arrangement of the angle guide channels inside the thin tubular body. The main body has a positioning part that determines the relative position around the axis of the connecting pipe on the inner wall, and the main body is fitted while the main body and the connecting pipe are positioned relative to each other by the positioning part. In this state, each of the rod-like portions can be configured so as to correspond to the position where the angle guide channel is disposed inside the thin tubular body.

According to the endoscope insertion portion assembling adjustment jig according to claim 4,
The insertion portion is configured by connecting a flexible tube, a bending portion, a rigid portion, and a distal end portion in order from the gripping portion side of the endoscope, and the protruding amount of the rod-shaped portion in the radial direction with respect to the inner wall of the main body Is L, and the protrusion amount of the angle guide channel in the radial direction with reference to the inner wall of the curved portion is h,
L ≧ h
It is desirable to satisfy

  According to the endoscope insertion portion assembling adjustment jig according to claim 5, the connecting tube constitutes an outer shell of the rigid portion, and the positioning portion is a connecting portion formed for positioning with the distal end portion. Constructed to fit the notch shape of the tube. Thereby, positioning with a connecting pipe and a main body is made simple.

  According to the endoscope insertion portion assembling adjustment jig described in claim 6, it is desirable that the guide means has elasticity. Thereby, the damage of the structural member by contacting with a rod-shaped part during the process of inserting a structural member can be suppressed effectively.

  According to the endoscope insertion part assembling adjustment jig described in claim 7, it is possible to further have a locking means for connecting the divided parts. For example, the locking means is a screwing portion provided in the main body and a screw screwed into the screwing portion (Claim 8).

  According to the endoscope insertion portion assembling adjustment jig described in claim 9, the main body can have a cylindrical shape.

  From another point of view, an assembly method for an endoscope insertion portion according to the present invention is an assembly method for assembling an endoscope insertion portion composed of a flexible tube, a bending portion, a rigid portion, and a distal end portion. Endoscope insertion part having the above-mentioned various features in a connecting step that connects the tube, the bending portion, and the rigid portion in this order, and a connecting tube that forms the outer shell of the rigid portion connected to the bending portion by the connecting step A fitting step for fitting the adjustment jig for assembly while positioning by the positioning portion, and a bending member from the opposite side of the tip portion to the constituent member having the tip portion via a connecting pipe that has undergone the fitting step And an insertion step of inserting into the flexible tube, a removal step of removing the adjustment jig from the connecting tube after the inserting step, and a joining step of joining the tip portion to the connecting tube.

  According to the endoscope insertion portion assembling method of the eleventh aspect, the removing step is performed by disassembling the adjustment jig.

  As described above, according to the present invention, there is provided an adjustment jig that is provided only when a component member is inserted into an insertion portion and is removed when assembly is completed. Thereby, the diameter of the insertion portion is not increased as in the conventional focusing means. Further, the rod-shaped portion provided in the jig can be disposed inside the endoscope insertion portion without damaging the constituent members by creating a state in which the angle guide channel is extended to the rigid portion in a pseudo manner. It becomes possible. That is, according to the endoscope insertion portion assembling method of the present invention, the insertion portion can be assembled safely and easily by using the adjustment jig while maintaining the diameter of the endoscope insertion portion thin. It becomes possible.

  FIG. 1 is a view showing an electronic endoscope 100 having an insertion part assembled by using the assembling method of the present embodiment. As shown in FIG. 1, the electronic endoscope 100 includes an insertion portion 1, a forceps insertion port 2, and a grip portion 3.

  The insertion portion 1 formed in the electronic endoscope 100 is a long tube that is inserted into a body cavity and has flexibility. The insertion portion 1 includes a flexible tube 11, a bending portion 12, a rigid portion 13, and a distal end portion 14 in order from the proximal end side. The rigid portion 13 and the distal end portion 14 are provided with an endoscope constituent member such as an optical system that is used for imaging the body cavity during endoscope observation.

  FIG. 2 is an enlarged view of the distal end portion of the insertion portion 1. However, for convenience of explanation, FIG. 2 is a perspective view in which a part of the configuration such as a rubber tube covering the periphery of each part is omitted. In the description of each member in the text, the side close to the grip portion 3 is referred to as the proximal end side, and the side close to the distal end portion 14 is referred to as the distal end side. As shown in FIG. 2, the insertion portion 1 includes a flexible tube 11 distal end side and a bending portion 12 proximal end side (proximal end base 121), a bending portion 12 distal end side (distal end base 123), and a rigid portion 13 proximal end side ( The proximal end joining region 131), the distal end side (leading end joining region 132) of the rigid portion 13, and the distal end portion 14 proximal end (joining portion 141) are joined in a partially fitted state.

  The configuration of the insertion unit 1 will be further described in detail. FIGS. 3A to 3C are diagrams mainly illustrating the configuration of the bending portion 12. 3A and 3B show the bending portion 12 viewed from different angles, and FIG. 3C shows the bending portion 12 facing from the direction of the arrow line Z1 in FIG.

  As shown in FIGS. 3A to 3C, the bending portion 12 includes a proximal end base 121, a node ring structure 122, and a distal end base 123. The proximal end base 121 has a cylindrical shape and is joined to the distal end side of the flexible tube 11. In this embodiment, as shown in FIGS. 3A to 3C, the base end base 121 is joined by screwing to the distal end side of the flexible tube 11. The node ring structure 122 forms a cylindrical shape by arranging a plurality of ring-shaped members (hereinafter referred to as segments) S with their axes aligned. Each segment S is pivotally fixed by a pin P so that a part of the segments S adjacent to each other can rotate. The distal end base 123 has a cylindrical shape and is joined to the proximal end side of the rigid portion 12 described in detail below. Specifically, the tip base 123 has a shape corresponding to the concave portion 131b (see FIG. 4A) of the connecting tube 130, and a convex portion 123a serving as an index for positioning with the hard portion 13 is formed. Yes.

  As shown in FIG. 2, the node ring structure 122 is covered with a metal net tube 125 for maintaining strength and protecting internal components. The net tube 125 is soldered in the vicinity of the tip of the tip base 123. Therefore, by forming the positioning index (convex portion 123a) with the rigid portion 13 in a convex shape, a sufficient soldering area is secured and the net tube is firmly fixed.

  Further, as shown in FIGS. 3A to 3C, the base end base 121, each segment S of the node ring structure 122, and the tip base 123 have guide holes 124 at predetermined four locations on the inner wall portions thereof. . Specifically, in each of the proximal end base 121, each segment S of the node ring structure 122, and the distal end base 123, the four guide holes 124 are provided so that four rows of guide channels G are formed along the longitudinal direction. ing.

  Each guide channel G is inserted with a flexible angle wire (not shown) as an operation member for bending the vicinity of the distal end of the insertion portion 1. One end of the angle wire is connected to the operating mechanism of the grip portion, and the other end is connected to the tip base 123. That is, in the electronic endoscope 100 of the present embodiment, the four angle wires inserted through the respective guide channels G are appropriately pulled and released when the operator or the like operates the operation mechanism. As a result, the distal end side from the bending portion 12 rotates in the vertical and horizontal directions starting from the joint portion between the bending portion 12 and the flexible tube 11.

  Note that the inner diameters of the bases 121 and 123 and the segments S are not necessarily the same. In particular, the diameter of each of the bases 121 and 123 is designed to match the distal end of the flexible tube 11 and the proximal end of the rigid portion 12, respectively. Therefore, a step is generated between each base 121, 123 and the adjacent segment S, that is, each guide channel G may have an error along the radial direction of the bending portion 12. Therefore, in the following description, the amount of protrusion h from the inner wall that defines the size of the guide channel G is the guide hole that protrudes most toward the center (axis) of the curved portion 12 as shown in FIG. 124 is defined as the amount of protrusion. In addition, the error which each guide channel G has is a very small quantity which can be absorbed by the bending of an angle wire.

  The rigid portion 13 includes a connecting tube 130 that is a metal cylindrical member that constitutes the outer shell of the rigid portion 13. 4A and 4B are enlarged views of the connecting tube 130. FIG. 4A is a perspective view of the connecting tube 130, and FIG. 4B is a view of the connecting tube 130 as viewed from the distal end side of the endoscope. As shown in FIG. 4, the connecting tube 130 has a proximal end side joining region 131 and a distal end side joining region 132.

  The proximal end joining region 131 is a region for fitting and joining the distal end base 123 of the bending portion 12. The inner diameter of the joining region 131 is substantially equal to the outer diameter of the tip base 123. Further, the joining region 131 has an annular abutting surface 131a perpendicular to the central axis of the connecting tube 130 at a predetermined depth from the end of the region 131 (that is, the proximal end of the connecting tube 130). Have In addition, the proximal-side joining region 131 is provided with a concave portion 131 b that has a shape corresponding to the convex portion 123 a of the distal end base 123 and serves as an index for positioning with the curved portion 12.

  The distal end side joining region 132 is a region for joining to the proximal end side of the distal end portion 14. Specifically, the distal end side joining region 132 of the present embodiment has an inner diameter that is substantially equal to the outer diameter on the proximal end side of the distal end portion 14, and has a screw hole 132a in the vicinity of the end portion. Although the screw holes 132a are formed at a plurality of locations, only one location is shown in FIG. Further, the distal end side joining region 132 has a notch portion 132b that serves as an index for positioning around the axis with the connecting tube 130 when joining the distal end portion 14.

  As shown in FIG. 2, the distal end portion 14 has a joint portion 141. The joint 141 has a screw hole 141 a corresponding to the screw hole 132 a of the connecting pipe 130 and a convex part 141 b that fits the notch 132 b of the connecting pipe 130. The distal end portion 14 is often made of resin from the viewpoint of electrical safety in view of being a portion exposed in the body cavity. Further, in view of the efficiency of the disassembling work required at the time of repair, even if the tip portion 14 is made of metal, the connecting tube 130 and the tip portion 14 are not suitable for joining by soldering. Therefore, in this embodiment, the joining by screwing is employ | adopted.

  Next, the assembly method of the insertion part 1 of the structure mentioned above is explained in full detail. The insertion part 1 is assembled as follows. That is, as shown in FIG. 5, first, the flexible tube 11, the bending portion 12, and the connecting tube 130 are joined to each other to form a thin tubular body 1t (connection step). Then, the constituent member 50 to which the distal end portion 14 is attached is inserted into the thin tubular body 1t (insertion step). Thereby, the insertion part 1 is assembled.

  Here, as described above, the insertion portion 1 is very thin and long. That is, both the thin tubular body 1t and the constituent member 50 are very thin and long. Therefore, it is necessary to insert the constituent member 50 into the thin tubular body 1t so that the constituent members 50 do not interfere with each other or collide with the inner wall of the thin tubular body 1t (that is, the inner walls of the members 11 to 13). . In particular, as described above, the guide channel G formed inside the bending portion 12 is formed so as to protrude from the inner wall, so that, for example, the end portion of the guide channel G (just in the vicinity of the joining region between the bending portion 12 and the connecting tube 130). And the component member 50 being inserted are in a state of being easy to contact. Therefore, it is necessary to pay more attention to the relationship between the component member 50 and the guide channel G at the time of insertion. However, it is very difficult to grasp the internal state of the bending portion 12 via the connecting pipe 130.

  Therefore, in the assembly method of the present embodiment, by using an assembly adjustment jig described below, the burden on the operator during the insertion process is reduced, and safe and simple assembly of the insertion portion 1 is realized. .

  6A to 6C are diagrams schematically illustrating the configuration of the adjustment jig 500 of the embodiment. 6A is a perspective view showing the adjustment jig 500, FIG. 6B is a view showing the shape when the adjustment jig is faced from the Z2 direction in FIG. 6A, and FIG. 3 is an exploded view of a jig 500. FIG.

  As shown in FIGS. 6A to 6C, the adjustment jig 500 is divided into a plurality of parts by a cut surface extending from the front end to the rear end of the main body. In the present embodiment, the adjustment jig 500 is equally divided into two parts 500A and 500B by an arbitrary cross section including the central axis of the main body. Each of the components 500A and 500B includes a main body 501 having a semicircular cross section, a guide tube 502 extending from the inner wall of the main body 501, and a screwing portion 503. The main body 501 has a concave region 501a and a convex region 501b formed on the inner wall. The convex region 501b has a shape that fits the notch 132b of the connecting tube 130. When the parts 500A and 500B are brought into contact with each other, the main body 501 forms a hollow body (here, a cylindrical body). In the cylindrical body, the diameter of the recessed area 501 a is substantially equal to the outer diameter of the distal end side joining area 132 of the connecting pipe 130.

  The adjustment jig 500 includes the same number of guide cylinders 502 as the guide channels G included in the bending portion 12. That is, the adjustment jig 500 of this embodiment has four guide cylinders 502. Focusing on each component 500A, 500B, each has two guide cylinders 502. The guide cylinder 502 is formed of a member having a certain rigidity and also having elasticity. For example, the guide tube 502 of the present embodiment is assumed to be a tightly wound guide coil for protecting an angle wire for bending operation built in an insertion portion in a general endoscope.

The guide cylinders 502 are arranged in a positional relationship corresponding to the positional relationship of the guide channels G in the bending portion 12 with respect to the formation position of the convex region 501b. One end of each guide tube 502 is fixed on the substantially same curved surface as the convex region 501b on the inner wall of the main body 501. Accordingly, the guide tube 502 extends along the axial direction of the main body in a non-contact (non-fixed) state with respect to the main body 501 above the recessed area 501a. In each guide tube 502, when the protrusion amount in the axial direction from the convex region 501b is L, the protrusion amount L is set to have the following relationship with the protrusion amount h of the guide channel.
L ≧ h

  The distance between the recessed area 501a and the guide cylinder 502 corresponds to the thickness of the distal end side joining area 132 of the connecting pipe 130. Further, the length (extension amount) of the guide tube 502 is substantially equal to the entire length of the connecting tube 130. By inserting the constituent member 50 in a state where the adjustment jig 500 configured as described above is fitted in the connecting pipe, the constituent member 50 guided by the guide tube 502 can appropriately position the guide channel G. Inserted while avoiding. In other words, the use of the adjustment jig 500 further reduces the risk of causing the component members to contact the guide channel G.

  In the assembling method of this embodiment, prior to the insertion step of inserting the component member 50 into the thin tubular body 1t, the adjustment jig 500 configured as described above is fitted to the distal end side of the connecting tube 130 (fitting step). ). FIG. 7 is a view showing a thin tubular body 1t fitted with an adjustment jig 500. FIG. FIG. 8 is a cross-sectional view of the thin tubular body 1t fitted with the adjusting jig 500. More specifically, FIG. 8 is a view showing a cross section of the adjusting jig 500 and a cross section of the narrow tubular body 1t corresponding to this along the one-dot chain line POQ in FIG. 6 (B).

  Prior to the fitting, the components 500A and 500B constituting the adjustment jig 500 are integrated by inserting a screw 504 between the screwing portions 503. However, it is not completely screwed here, but a minute clearance c is formed between the two 500A and 500B.

  As shown in FIG. 8, the adjustment jig 500 in which the components 500 </ b> A and 500 </ b> B are integrated is fitted so that the convex region 501 b fits into the notch 132 b of the connecting tube 130. Here, as shown in FIG. 8, in the connecting step, the bending portion 12 and the connecting tube 130 are positioned around the axis by the convex portion 123a and the concave portion 131b. Accordingly, when the adjustment jig 500 is positioned with respect to the connecting tube 130 by the convex region 501b and the notch portion 132b of the connecting tube 130, the adjusting jig 500 is automatically positioned with respect to the bending portion 12 as well. As described above, in the adjustment jig 500, each guide cylinder 502 is disposed with the convex region 501b as a reference. Therefore, when positioning is performed by the convex region 501b and the notch 132b of the connecting tube 130, the relative position of each guide tube 502 around the axis in the connecting tube 130 is also determined. Specifically, as shown in FIG. 8, each guide tube 502 is positioned on the longitudinal extension of each guide channel G.

  After the fitting, the components 500A and 500B are screwed together using the screw 504 to eliminate the clearance c. Thereby, the front end side joining area | region 132 of the connecting pipe 130 is clamped by each components 500A and 500B of the adjustment jig 500. FIG. That is, the adjustment jig 500 and the connecting tube 130 (that is, the thin tubular body 1t) are fixed in a state where the positioning around the axis and the axial direction are performed.

  Next, the above-described insertion process is executed. Through the fitting process, the guide tube 502 of the adjustment jig 500 is disposed at a position corresponding to each guide channel G in the connecting pipe 130. Accordingly, in the insertion step, the component member 50 is guided in the narrow tubular body 1t by the adjustment jig 500 while avoiding the position where each guide channel G is properly disposed, in an extremely safe and smooth manner.

  FIG. 9 is a diagram showing a state in which the constituent member 50 is generally inserted into the thin tubular body 1t by the insertion process. A process of removing the adjusting jig 500 from the connecting pipe 130 (removing process) in a state where the long component member 50 is inserted and the distal end portion 14 and the distal end side joining region 132 of the connecting pipe 130 are close to each other. Execute. Specifically, first, the screws 504 that have integrated the parts 500A and 500B of the adjustment jig 500 are removed to separate them. Then, each component 500A, 500B is removed separately from the connecting tube 130 independently. Here, since each guide cylinder 502 has elasticity, even if each part 500A, 500B is removed in the direction away from the axis of the connecting tube 130 (the direction of the arrow line in FIG. 9), the inserted component member 50 is damaged. There is nothing.

  When the above removal process is completed, the distal end portion 14 is joined to the distal end side joining region 132 of the connecting pipe 130 more accurately than the thin tubular body 1t (joining process). Specifically, the distal end portion 14 aligns the convex portion 141b of the joint portion 141 with the notch portion 132b of the distal end side joining region 132, thereby positioning the distal end portion 14 and the connecting tube 130, and screw holes 132a. , 141a.

  As described above, according to the assembling method of the present embodiment, by using the adjustment jig 500, the component member 50 can be inserted into the narrow tubular body 1t very safely and easily. Moreover, since the adjustment jig 500 is removed after the component member 50 is inserted, it does not hinder the diameter reduction of the insertion portion 1.

  The above is the embodiment of the present invention. The present invention is not limited to these embodiments and can be modified in various ranges.

  For example, the adjustment jig 500 of the above embodiment is equally divided into two parts 500A and 500B. However, the adjustment jig according to the present invention is not limited to this configuration, and can be divided into three or more parts. Moreover, each part does not need to be equally divided.

  In the above embodiment, the components 500 </ b> A and 500 </ b> B of the adjustment jig 500 are integrated by screwing and further fixed to the connecting pipe 130. The adjustment jig according to the present invention is not limited to such a configuration. For example, it is also possible to fix by attaching an adhesive tape or the like as an alternative to screwing.

  In addition, the adjustment jig of the above embodiment presents the guide cylinders 502 extending from the main body 501 and having the number and arrangement corresponding to the guide channels G as means for guiding the component member 50 into the thin tubular body 1t. The adjustment jig according to the present invention is not limited to this. If it is a member in which each guide channel is concealed when facing the component member insertion port, that is, the end face of the connecting tube 130, it is effective as a means for guiding the insertion into the narrow tubular body 1t while avoiding each guide channel. Function. Therefore, for example, it may be a cylindrical member that regulates the diameter (that is, the insertion path) in the thin tubular body 1t so as not to interfere with each guide channel. With such a cylindrical member, the thin tubular body 1t and the adjustment jig do not need to be positioned and are very simple. However, when the guide cylinder 502 corresponding to each guide channel is used as in the above-described embodiment, the constituent members can be effectively inserted into the space existing between the guide channels, and the interior is less wasteful. There is also the unique advantage that the arrangement is realized.

  In the adjustment jig of the above embodiment, the main body 501 has a cylindrical shape, but is not limited thereto. As long as the main body has a hollow shape having at least an inner diameter substantially equal to the outer diameter of the connecting pipe, the outer surface shape can be made, for example, an easy-to-handle shape.

It is a figure which shows the electronic endoscope of embodiment of this invention. It is a figure which expands and shows the insertion part front-end | tip part of the electronic endoscope of embodiment of this invention. It is a figure which shows the structure of the curved part of embodiment of this invention. It is a figure which expands and shows the connecting pipe of embodiment of this invention. It is a figure for demonstrating the insertion part assembly method of embodiment of this invention. It is a figure which shows the structure of the adjustment jig of embodiment of this invention. It is an external view which shows the thin tubular body of the state by which the adjustment jig was fitted. It is sectional drawing which shows the thin tubular body of the state by which the adjustment jig was fitted. It is a figure for demonstrating the insertion part assembly method of embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insertion part 11 Flexible tube 12 Bending part 13 Rigid part 130 Connecting pipe 14 Tip part 100 Endoscope 500 Adjustment jig 501 Main body 501b Convex part area (positioning part)
502 Guide tube (guide means)
G Guide channel

Claims (11)

An adjustment jig used when inserting a constituent member having a distal end portion of the insertion portion into a thin tubular body that is an outer shell of an insertion portion of an endoscope,
A hollow main body having an inner diameter substantially equal to an outer diameter of a connecting pipe constituting one end vicinity of the outer shell and configured to be divided into a plurality of parts by a cutting surface extending from the front end to the rear end;
A guide means for extending a predetermined amount from the main body along the axial direction of the main body and guiding the component member into the insertion portion;
In a state where the main body is fitted to the connecting pipe, the guide means is inserted so as to guide the component member into the insertion portion while avoiding the position of the angle guide channel inside the narrow tubular body. An adjustment jig for assembling an endoscope insertion portion, characterized in that In the adjustment jig for assembling an endoscope insertion portion according to claim 1,
The adjustment tool for assembling an endoscope insertion portion, wherein the guide means has a total length substantially equal to a total length of the connecting pipe. In the endoscope insertion portion assembling adjustment jig according to claim 1 or 2,
The guide means has the same number of rod-shaped portions extending from the main body along the axial direction of the main body as the number of angle guide channels provided in the thin tubular body,
The main body has an inner wall formed with a positioning portion for determining a relative position around an axis with the connecting pipe,
In the state in which the main body and the connecting pipe are fitted while being positioned relative to each other by the positioning portion, the rod-like portions are respectively positioned corresponding to the positions where the angle guide channels are disposed in the narrow tubular body. An adjustment jig for assembling an endoscope insertion portion, characterized in that In the adjustment jig for assembling an endoscope insertion portion according to claim 3,
The insertion portion is configured by connecting a flexible tube, a bending portion, a rigid portion, and the distal end portion in order from the gripping portion side of the endoscope.
When the protruding amount of the rod-shaped portion in the radial direction with reference to the inner wall of the main body is L, and the protruding amount of the angle guide channel in the radial direction with reference to the inner wall of the curved portion is h,
L ≧ h
An adjustment jig for assembling an endoscope insertion portion, characterized by satisfying The adjustment jig for assembling an endoscope insertion part according to claim 4,
The connecting pipe constitutes an outer shell of the hard part,
The endoscope insertion portion assembling adjustment jig, wherein the positioning portion is adapted to a notch shape of the connecting tube formed for positioning with the distal end portion. In the endoscope insertion part assembly adjusting jig according to any one of claims 1 to 5,
The guide for assembling an endoscope insertion portion, wherein the guide means has elasticity. In the endoscope insertion part assembly adjusting jig according to any one of claims 1 to 6,
An adjustment jig for assembling an endoscope insertion portion, further comprising locking means for locking the plurality of divided parts together. In the endoscope insertion portion assembling adjustment jig according to claim 7,
The endoscope insertion portion assembling adjustment jig, wherein the locking means is configured to screw together the plurality of parts by screws. In the endoscope insertion part assembling adjustment jig according to any one of claims 1 to 8,
The adjustment jig for assembling an endoscope insertion portion, wherein the main body has a cylindrical shape. An assembly method for assembling an endoscope insertion portion composed of a flexible tube, a bending portion, a rigid portion, and a tip portion,
A connecting step of connecting the flexible tube, the bending portion, and the rigid portion in order;
The endoscope insertion portion assembling adjustment jig according to any one of claims 1 to 9 is fitted to a connecting tube constituting an outer shell of the rigid portion connected to the curved portion by the connecting step. A mating process to
An insertion step of inserting the constituent member having the tip portion from the opposite side of the tip portion into the bending portion and the flexible tube through the connecting tube that has undergone the fitting step;
After the insertion step, a removal step of removing the adjustment jig from the connecting tube,
A method of assembling the endoscope insertion portion, comprising: a joining step of joining the distal end portion to the connecting pipe. In the assembly method of the endoscope insertion part according to claim 10,
The method of assembling an endoscope insertion portion, wherein the removing step is performed by separating the adjustment jig.

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