JP4269253B2 - End-cap insertion jig for endoscope insertion part - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mounting jig for a distal end cap of an endoscope insertion portion, and more particularly to a mounting jig for mounting by engaging a protruding portion of a distal end cap with a groove of a distal end main body.
[0002]
[Prior art]
The insertion portion of the medical endoscope has a tip portion made of a metal tip portion body and a rubber tip cap, and the tip cap is detachably attached to the tip portion body. A protrusion is provided on the inner side of the tip cap, and the protrusion is engaged with the groove of the tip main body so that the tip cap is mounted on the tip main body.
[0003]
Patent Document 1 describes a distal end portion of an endoscope insertion portion in which an index symbol is provided on each of a distal end portion main body and a distal end cap. According to this tip portion, when the tip cap is attached to the tip portion main body, the index symbol of the tip portion main body and the index symbol of the tip cap constitute one character. Thereby, it can confirm that the front-end | tip cap was mounted | worn with the front-end | tip part main body.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 8-243071
[Problems to be solved by the invention]
However, Patent Document 1 has a drawback that the mounting operation is difficult because the tip end body is covered with a small and soft rubber tip cap by hand and the two index symbols are matched.
[0006]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a mounting jig for a distal end cap of an endoscope insertion portion that can securely mount the distal end cap to the distal end portion main body.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention according to claim 1 has a protrusion that is engaged with a groove formed in the distal end body of the endoscope insertion portion, and the protrusion is engaged with the groove. In the mounting jig of the tip cap attached to the tip body, a through hole through which the tip cap with the protrusion engaged with the groove is formed in the jig body. When a tip cap that covers the tip body is inserted, the protrusion is engaged with the groove and inserted into the through hole.
[0008]
According to the first aspect of the present invention, the protrusion of the tip cap is engaged with the groove of the tip portion main body by being inserted into the through hole of the jig body. Therefore, the tip cap can be securely attached to the tip portion main body.
[0009]
In order to achieve the above-mentioned object, the invention according to claim 2 has a protrusion that is engaged with a groove formed in the distal end body of the endoscope insertion portion, and the protrusion is engaged with the groove. In the jig for attaching the tip cap attached to the tip portion main body, a through-hole through which the tip cap with the protruding portion engaged with the groove is formed in the jig body, and the tip cap is Holding means for holding the state inserted into the through hole is provided in the jig body, and when the tip cap held by the holding means is inserted into the through hole while covering the tip body, the protrusion is formed into the groove. And is inserted into the through hole.
[0010]
According to the second aspect of the present invention, since the mounting operation is performed while holding the tip cap by the holding means, the mounting operation can be easily performed.
[0011]
According to a third aspect of the present invention, the jig body is provided with an index indicating a positional relationship between the jig body and the tip cap. Therefore, according to the invention described in claim 3, it is possible to insert the tip cap into the through hole of the jig body in a correct posture or to confirm that the inspection of the tip cap has been completed.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of a mounting jig for a distal end cap of an endoscope insertion portion according to the present invention will be described below in detail with reference to the accompanying drawings.
[0013]
First, as an example of the distal end portion of the endoscope insertion portion in which the jig for attaching the distal end cap of the endoscope insertion portion according to the present invention is used, the structure of the distal end portion of the insertion portion of the side-view type endoscope will be described. .
[0014]
As shown in FIG. 1, the distal end portion 10 includes a distal end portion main body 12 and a distal end cap 14 that is detachably attached to the distal end portion main body 12.
[0015]
The tip end body 12 is made of a metal material having good corrosion resistance such as stainless steel, and a stand support groove 16 for receiving a stand (not shown) is formed at the center position of the tip end body 12. A treatment instrument insertion channel (not shown) is communicated with the upright stand receiving groove 16, and this treatment instrument insertion channel is inserted into the endoscope insertion portion and connected to a hand operation portion (not shown). Therefore, when the treatment tool is inserted into the treatment tool insertion channel from the hand operation unit, the treatment tool is guided to the upright stand receiving groove 16. The guided treatment tool is raised by an upright stand and led upward.
[0016]
On the side of the stand support groove 16, a stand lever storage chamber 20 and an optical system storage chamber 22 are provided so as to sandwich the stand support groove 16.
[0017]
An upright lever (not shown) for swinging the upright base is housed in the upright lever housing chamber 20. The standing lever is provided so as to be swingable and swings integrally with the stand. In addition, an upright wire (not shown) is connected to the upright lever, and this upright wire is connected to the hand operating section. Therefore, by operating the hand operation unit, the standing wire is pushed and pulled to swing the standing lever, and as a result, the standing base is swung.
[0018]
On the upper surface of the upright lever housing chamber 20, a convex strip portion 32 is formed in the longitudinal direction of the tip portion 10. A concave groove 34 is formed inside the tip cap 14 at a position corresponding to the convex portion 32. The ridge 32 and the groove 34 are engaged when the tip cap 14 is mounted on the tip body 12.
[0019]
On the other hand, a photographing optical system and an illumination optical system are housed inside the optical system housing chamber 22. The illumination optical system includes an illumination lens optical system (not shown) installed inside the irradiation window 28, and a light guide arranged so that the tip thereof faces the illumination lens optical system. It is inserted into the mirror insertion part and connected to an external light source device (not shown). The photographing optical system includes an objective lens optical system (not shown) arranged inside the observation window 26, and a CCD unit (not shown) arranged via a prism behind the objective lens optical system, The CCD unit is connected to an external device (for example, a processor) via a cable.
[0020]
An air / water supply port 30 is provided in the upper part of the optical system housing chamber 22 toward the observation window 26. The air / water supply port 30 is connected to an external device via an air / water supply tube (not shown) inserted through the endoscope insertion portion, and operates the air / water supply button of the hand operation unit. Compressed air or water is jetted from the air / water supply port 30 toward the observation window 26 to clean the observation window 26.
[0021]
The observation window 26, the irradiation window 28, and the air / water supply port 30 are provided at positions facing the opening 14 </ b> A of the cap 14 when the cap 14 is put on the tip body 12.
[0022]
The distal end cap 14 is made of an elastic material such as silicon rubber, and a protrusion 14C is formed on the inner peripheral surface of the base end 14B over the entire circumference. The protrusion 14C is engaged with a groove 12C formed on the outer peripheral surface of the tip end body 12. As shown in FIG. 2, the cap 14 is attached to the tip end body 12 by engaging the protrusion 14 </ b> C with the groove 12 </ b> C.
[0023]
The mounting jig according to the present invention is a tool for mounting the above-described distal end portion body 12 to the distal end cap 14.
[0024]
3 is a front view of the mounting jig 40, and FIG. 4 is a side sectional view of the mounting jig 40.
[0025]
As shown in these drawings, the mounting jig 40 has a ring-shaped jig body 42, and a through hole 42 </ b> A is formed at the center of the jig body 42. The through hole 42A is formed according to the shape of the tip cap 14, and when the tip cap 14 is completely attached to the tip portion main body 12 (that is, when the projection 14C is engaged with the groove 12C). ) Only, the tip cap 14 is formed so as to pass through the through hole 42A. Therefore, as shown in FIG. 5, when the tip cap 14 is not completely attached to the tip portion main body 12, it does not pass through the through-hole 42A in that state. As shown in FIG. 7A or FIG. 7B, the tip cap 14 shown in FIG. 5 has a protruding portion 14C turned up on the outer peripheral surface of the tip portion main body 12, and the thickness b, c is larger than the thickness a of the tip cap 14 of the other part. The through hole 42A of the jig body 42 is formed so that the clearance d with the outer surface of the tip end body 12 is larger than the thickness a and smaller than the thicknesses b and c. Therefore, when the jig body 42 shown in FIG. 5 is moved in the right direction in FIG. 5 relative to the distal end portion body 12, the proximal end portion 14B of the distal end cap 14 is caught on the peripheral edge portion of the through hole 42A. It moves with the jig body 42. As shown in FIG. 8, the protrusion 14 </ b> C of the tip cap 14 engages with the groove 12 </ b> C of the tip body 12. As a result, the tip cap 14 is inserted into the through hole 14A as shown in FIG.
[0026]
As shown in FIG. 3, the jig body 42 is provided with a plurality of index symbols for indicating the positional relationship between the jig body 42 and the tip cap 14. For example, the index symbols 44 </ b> A and 44 </ b> B indicate the type of the tip portion to be attached and the upper and lower sides of the jig main body 42. Therefore, the upper and lower sides of the jig main body 42 and the upper and lower ends of the tip cap 14 can be aligned using the index symbols 44A and 44B, and the tip cap 14 can be inserted into the through hole 42A of the jig main body 42 in the correct posture.
[0027]
3 is formed in accordance with the position of the index symbol 46 (see FIG. 1) provided on the tip cap 14. The index symbol 46 of the tip cap 14 is formed by printing or by providing a concave recess, and is formed in a line shape in the circumferential direction. By aligning the index symbol 44C with the position of the index symbol 46, the tip cap 14 can be inserted into the through hole 42A in the correct posture. The index symbol 46 of the tip cap 14 is formed at a position indicating the end of the mounting operation. That is, when the tip cap 14 is inserted into the through hole 42A from the tip side, the protrusion 14C appears from the through hole 42A when inserted into the through hole 42A. Therefore, it can be seen that the indicator symbol 46 appears from the through hole 42A, and the protrusion 14C of the tip cap 14 is inserted into the through hole 42A, and the mounting is completely completed.
[0028]
Next, the operation of the mounting jig 40 configured as described above will be described.
[0029]
First, the tip cap 14 is put on the tip portion main body 12. At this time, it is only necessary that the tip cap 14 covers the tip of the tip portion main body 12, and it is not necessary to engage the protrusion 14C with the groove 12C.
[0030]
Next, the tip cap 14 that covers the tip portion main body 12 is inserted into the through hole 42 </ b> A of the jig main body 42. At that time, as shown in FIG. 5, the base end portion 14 </ b> B of the tip cap 14 is hooked on the peripheral portion of the through hole 42 </ b> A, and the tip cap 14 moves together with the jig main body 42. And when the position of the base end part 14B of the front-end | tip cap 14 corresponds with the position of the groove | channel 12C of the front-end | tip part main body 12, the projection part 14C engages with the groove | channel 12C. Thereby, as shown in FIG. 6, the tip cap 14 passes through the through hole 42A. At this time, since the index symbol 46 of the tip cap 42 appears from the through hole 42A, it can be visually confirmed that the mounting operation has been completed.
[0031]
As described above, according to the mounting jig 10 of the present embodiment, when the tip cap 14 incompletely attached to the tip body 12 is inserted into the through hole 42A of the jig body 42, the tip cap 14 is attached to the tip body 12. Installed.
[0032]
If the projection 14C is engaged with the groove 12C when the distal end cap 14 is first put on the distal end main body 12, the distal end cap 14 will not be caught by the through hole 42A. It is inserted into the through hole 42A. At this time, since the index symbol 46 appears from the through hole 42A, it can be visually confirmed that the mounting operation has been completed.
[0033]
The above-described embodiment is an example in which the tip end cap 14 is put on the tip end main body 12 in advance and inserted into the through hole 42A of the jig main body 42, but the procedure of the mounting work is limited to this. It is not a thing. The tip cap 14 may be held on the jig main body 42, the tip portion main body 12 may be inserted into the tip cap 14, and the tip cap 14 may be inserted into the through hole 42A. In that case, a holding means for the tip cap 14 may be provided on the jig body 42. For example, the jig body 42 shown in FIG. 9A is provided with a pair of pins 48 and 48 as holding means. The pair of pins 48, 48 are attached at opposing positions and are supported so as to be slidable in the radial direction of the jig main body 42. Each pin 48 is biased outward by a spring 50, and the inner tip 48A of the pin 48 is retracted from the through hole 42A during standby. When the pin 48 is pressed inward against the urging force of the spring 50, the inner tip 48A of the pin 48 advances into the through hole 42A of the jig body 42.
[0034]
A large diameter portion 42B having a large hole diameter is formed at the peripheral edge portion of the through hole 42A of the jig body 42.
[0035]
When using the mounting jig 40 configured as described above, first, the tip cap 14 is inserted into the through hole 42 </ b> A of the jig main body 42. Then, as shown in FIG. 9B, the pin 48 is pressed from the outside in a state where the proximal end portion 14 </ b> B of the distal end cap 14 is aligned with the end surface of the jig main body 42. As a result, the inner tip 48A of the pin 48 protrudes from the inner peripheral surface of the through hole 42A, and the tip cap 14 is held under pressure.
[0036]
Next, the tip end body 12 is inserted into the tip cap 14. At this time, the base end portion 14 </ b> B of the distal end cap 14 is expanded outward and fits in the large diameter portion 42 </ b> B of the jig main body 42.
[0037]
After inserting the tip of the tip body 12 to the position of the inner tip 48A of the pin 48, the pressing operation of the pin 48 is stopped. The tip body 12 is further inserted into the tip cap 14 with the inner tip 48A of the pin 48 retracted from the through hole 42A. At this time, the proximal end portion 14B of the distal end cap 14 bulges outward and is hooked on the jig body 42 while being accommodated in the large diameter portion 42B, and therefore the distal end cap 14 is fixed to the jig body 42. .
[0038]
When the distal end body 12 is further inserted into the distal end cap 14, the protrusion 14C of the proximal end portion 14B engages with the groove 12C. Then, the tip cap 14 is inserted into the through hole 42 </ b> A together with the tip body 12. Thereby, the tip cap 14 is attached to the tip portion main body 12.
[0039]
When the tip cap 14 is held on the jig main body 42 in this manner, the mounting operation of the tip cap 14 and the tip portion main body 12 can be easily performed.
[0040]
The holding means for holding the tip cap 14 is not limited to the pins 48 and 48 shown in FIG. 9, and for example, leaf spring members 52 and 52 may be used as shown in FIG. The leaf spring members 52, 52 are installed at intervals t slightly smaller than the outer dimension of the tip cap 14. Therefore, when the tip cap 14 is inserted between the leaf spring members 52, 52, the gap between the leaf spring members 52, 52 is widened and the tip cap 14 is held. Even if such a holding means is used, the tip cap 14 can be inserted easily.
[0041]
In the above-described embodiment, only one through hole 42A is formed in the jig main body 42. However, as shown in FIG. 11, a plurality of through holes 56A, 56B, and 56C are provided in the elliptical jig main body 56. May be. Thereby, it is possible to deal with a plurality of types of tip portions using a common mounting jig. Also in this case, it is preferable to provide a holding means (not shown) for the tip cap 14 in each of the through holes 56A to 56C or provide index symbols 58A to 58C.
[0042]
Further, the types of index symbols provided on the jig bodies 42 and 56 and the tip cap 14 are not limited to the above-described embodiments, and as long as the positional relationship between the jig bodies 42 and 56 and the tip cap 14 can be understood. Good. For example, as shown in FIG. 12, an index symbol 62 in the axial direction may be provided on the outer peripheral surface of the tip cap 14, and an index symbol 64 may be formed on the outer peripheral surface of the jig body 42 in accordance with the index symbol 62. The leading end cap 14 can be inserted into the through hole 42A by guiding the leading end cap 14 to the through hole 42A so that the positions of the index symbol 62 and the index symbol 64 are aligned.
[0043]
The mounting jig 40 described above is not only a tool for mounting the distal end cap 14 to the distal end main body 12 but also an inspection jig for inspecting whether the distal end cap 14 is mounted on the distal end main body 12. Can be used.
[0044]
Moreover, although the distal end portion 10 of the endoscope insertion portion described above is a configuration example of a side-view type endoscope in which the observation direction and the insertion direction are orthogonal to each other, the structure of the distal end portion of the endoscope insertion portion However, the jig of the present invention can also be used in a direct-view endoscope in which the insertion direction and the observation direction are the same.
[0045]
【The invention's effect】
As described above, according to the mounting jig according to the present invention, since the protruding portion of the tip cap is engaged with the groove of the tip portion main body by being inserted through the through hole of the jig body, the tip cap is attached to the tip portion main body. It can be installed securely.
[Brief description of the drawings]
FIG. 1 is an assembly view showing a structure of a distal end portion of a side-view type endoscope mounted using the present invention. FIG. 2 is a side view showing a distal end portion in which a distal end cap is attached to a distal end portion main body. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 3. FIG. 5 shows the tip cap and the mounting jig before the end of the mounting. Sectional view [Fig. 6] Cross-sectional view showing the end cap and mounting jig after the end of mounting. [Fig. 7] Enlarged view of portion P in Fig. 5. [Fig. 8] Enlarged view of portion Q in Fig. 6. [Fig. FIG. 10 is a cross-sectional view showing a mounting jig provided with a holding means different from that in FIG. 8. FIG. 11 is a mounting used in common for the distal ends of a plurality of types of endoscope insertion portions. Front view showing a jig [FIG. 12] Side view showing a mounting jig on which other index symbols are formed [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Tip part, 12 ... Tip part main body, 14 ... Cap, 16 ... Standing stand accommodation groove, 20 ... Standing lever accommodation room, 22 ... Optical system accommodation room, 26 ... Observation window, 28 ... Irradiation window, 30 ... Air supply -Water supply port, 32 ... convex strip, 34 ... concave groove, 40 ... mounting jig, 42 ... jig body, 42A ... through hole, 44A-44C ... index symbol, 46 ... indicator symbol, 48 ... pin, 50 ... spring 52 ... Plate spring member, 56 ... Jig body, 56A-56C ... Through-hole, 58A-58C ... Indicator symbol

Claims (3)

A projection cap that is engaged with a groove formed in the distal end body of the endoscope insertion portion, and the distal end cap is mounted on the distal end body when the projection is engaged with the groove. In the jig
A through hole is formed in the jig body through which the tip cap with the protruding portion engaged with the groove is inserted,
When the distal end cap that covers the distal end portion main body is inserted into the through hole, the projection is engaged with the groove and inserted into the through hole. Wearing jig. A projection cap that is engaged with a groove formed in the distal end body of the endoscope insertion portion, and the distal end cap is mounted on the distal end body when the projection is engaged with the groove. In the jig
A through hole through which the tip cap with the protrusion engaged with the groove is formed in the jig body, and holding means for holding the tip cap inserted in the through hole is provided in the jig body. And
An endoscope characterized in that when the tip cap held by the holding means is inserted into the through hole while covering the tip portion main body, the projection is engaged with the groove and inserted into the through hole. Mounting jig for the end cap of the insertion section. 3. The jig for attaching a distal end cap of an endoscope insertion portion according to claim 1 or 2, wherein the jig body is provided with an index indicating a positional relationship between the jig main body and the distal end cap.

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