JP3495481B2 - Endoscope pipe cleaning tap - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention closes the mouth opening of a cylinder after removing the conduit switching valve element from the cylinder in order to clean the inside of the fluid conduit and the conduit switching valve after using the endoscope. The present invention relates to a stopper for cleaning the inside of a conduit of an endoscope.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional conduit pipe cleaning plug for an endoscope, and 11 is a cylinder of an air / water supply conduit switching valve.
21 is a cylinder of the suction line switching valve,
The mouth openings 1 and 21 are exposed and arranged on the outer surface of the operation unit 1. 14 and 24 are indexes.

The cleaning plug 90 is provided on both cylinders 1.
Fitting portions 90 fitted into the mouth openings of the Nos. 1 and 21
a and 90b are integrally formed with the grip portion 90c on the proximal side and made of a rubber material having elasticity.

The fitting portions 90a and 90b are connected to the cylinder 1 through the fluid lines 12a to 12d, 22a and 22b.
Since the cleaning liquid flowing into the inside of 1, 21 should not leak,
It is formed to be slightly thicker than the mouth openings of the cylinders 11 and 21 so that the cylinders 11 and 12 can be fitted tightly.

[0005]

However, as described above, the fitting portions 90a and 90b are attached to the cylinders 11 and 21.
If it is made thicker than the mouth opening of
The resistance when fitting into 1 is so large that it is difficult to fit.
Therefore, fitting may be incomplete and leakage may occur.

Therefore, for example, as shown in FIG. 6, it is conceivable to form the fitting portions 90a and 90b in a tapered shape, but the narrow portion on the leading side has no sealability and a substantial sealing area. Therefore, when the internal pressure of the cylinders 11 and 21 becomes high, the cleaning liquid tends to leak, and the plug 90 may come off from the cylinders 11 and 21.

Therefore, an object of the present invention is to provide a plug for cleaning the inside of a conduit of an endoscope which can be easily mounted on a cylinder and can obtain a reliable sealing property.

[0008]

In order to achieve the above-mentioned object, a pipe line cleaning plug of an endoscope of the present invention is a pipe inserted into a cylinder to which a pipe for passing a fluid is connected. After the passage switching valve body is removed from the cylinder, it is fitted into the cylinder at the stopper for cleaning the inside of the duct of the endoscope that is fitted into the mouth opening of the cylinder from the outside and closes the mouth opening. It is characterized in that the portion is made of an elastic material to have a thickness that allows it to be fitted in the cylinder in a deformed state as tightly as possible, and a conical recess is formed on the rear end surface of the fitting portion.

When the fitting portion is fitted into the cylinder, the apex of the conical recess may be located near the mouth opening of the cylinder. Further, when a plurality of the cylinders are arranged side by side, a plurality of fitting portions that are simultaneously fitted into the plurality of cylinders may be integrally connected and formed.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows the operation unit 1 of the endoscope, 10 is an air / water supply conduit switching valve for performing an air / water supplying operation, and 20 is a suction conduit switching valve for performing a suction operation, Reference numerals 19 and 29 are operation buttons that are pushed in to perform the operation.

FIG. 3 is an enlarged view showing the parts of the air / water supply conduit switching valve 10 and the suction conduit switching valve 20, 11 is a cylinder of the air / water supplying conduit switching valve 10, and 21 is a suction. It is a cylinder of the conduit switching valve 20. Both cylinders 11 and 21 are formed to have a circular cross section to the inside.

However, as shown in FIG. 4 which shows the shapes of the mouth openings 11a and 21a of both cylinders 11 and 21, the suction side cylinder 21 is formed with a small circular bulge in the cross section of the portion near the mouth. Therefore, it is welded and connected to two parts for manufacturing convenience.

A piston-shaped conduit switching valve body (not shown) is fitted in both cylinders 11 and 21 so as to be movable back and forth in the axial direction, and operation buttons 19 and 2 are provided at the tips thereof.
9 are connected.

However, when cleaning after using the endoscope, as shown in FIG.
As shown in FIG.
9 and 29 and the like are removed from the cylinders 11 and 21 to the outside, so that the mouth openings 11a and 21a of the cylinders 11 and 21 are exposed to the outer surface of the operation unit 1.

Both of the cylinders 11 and 21 are fixed to the operating portion 1 by fixing nuts 13 and 23 screwed from the outside to the outer peripheral thread portion of the mouth portion protruding to the outer surface of the operating portion 1. Index 1 on the surface of 23
4, 24 are formed. Reference numerals 15 and 25 are O-rings for sealing.

Inside the operation unit 1, the air / water supply side cylinder 11 is connected with an air supply pipe 12a, a water supply pipe 12b, an air supply pipe 12c and a water supply pipe 12d, and the suction side cylinder 21 is provided with a suction pipe 22a and forceps. Communication pipe to channel 2
2b is connected.

FIG. 1 shows such two cylinders 11, 21.
It shows a state in which the pipe cleaning plug 30 is attached to the mouth openings 11a and 21a. In the cleaning plug 30, short rod-shaped fitting portions 30a and 30b fitted into the mouth openings 11a and 21a of both cylinders 11 and 21 are arranged in accordance with the space between the air and water feeding side cylinder 11 and the suction side cylinder 21. It is arranged and is integrally formed with the grip portion 30c on the near side by a rubber material having elasticity. Therefore, both fitting portions 30a,
30b can be fitted into both cylinders 11 and 21 at the same time.

Both fitting portions 30a, 30b have an outer diameter of both cylinders 1 so that they can be fitted into the mouth openings 11a, 21a of both cylinders 11, 21 in a deformed state.
It is formed to be slightly thicker than the inner diameters of the mouth openings 11a and 21a of 1, 21.

The cross-sectional shapes of both fitting portions 30a, 30b are the opening openings 11a, 2 of both cylinders 11, 21.
According to the cross-sectional shape near 1a, the air / water feeding side fitting portion 30a is formed in a circular shape, and the suction side fitting portion 30b.
Is formed in a two-step circular shape as shown in FIG.

Both fitting portions 30a and 30b are formed to have a constant outer diameter. Therefore, cylinder 1
In the state where the cylinders 11 and 21 are completely fitted, the entire outer peripheral surface is in close contact with the inner peripheral surfaces of the cylinders 11 and 21 to be sealed.

Conical recesses 30d and 30e are formed in the end surface portions on the inner side of both fitting portions 30a and 30b. The dents 30d and 30e have a bottom diameter of about half to three quarters of the diameter of the fitting portions 30a and 30b, and the vertices of the dents 30d and 30e are located at the mouth openings 11a and 21a of the cylinders 11 and 21. Has been formed.

Therefore, the fitting portions 30a, 30b
When the is fitted into the cylinders 11 and 21, the fitting portions 30a and 30b made of rubber are relatively easily deformed inward with a space due to the recesses 30d and 30e, so that the fitting operation does not become hard and the fitting operation is relatively difficult. Can be easily fitted.

Further, since the recesses 30d and 30e are formed in a conical shape, the fitting state becomes gradually harder as it is fitted further into the interior, and the sealing property is improved. Further, when the pressure of the cleaning liquid is applied to the cylinder in the completely fitted state, a force acts in the direction in which the conical recesses 30d and 30e are expanded, so that the sealing property is further enhanced and leakage does not occur.

When the fitting portions 30a and 30b are completely fitted into the cylinders 11 and 21, hook portions 30f formed at both ends of the grip portion 30c are formed at the projecting end portions of the fixing nuts 13 and 23. The collar part 16,2
6 is caught and acts as a stopper.

[0025]

According to the present invention, since the portion to be fitted in the cylinder is made of an elastic material and has a thickness that allows it to be fitted tightly in the cylinder in a deformed state, a reliable sealing property can be obtained. In addition, since the conical recess is formed on the end surface on the back side of the fitting portion, the fitting portion is relatively easily deformed inward when fitted into the cylinder, so if the fitting operation is hard. Instead, it can be fitted easily and surely. Since the recess is formed in a conical shape, the deeper the fitting becomes, the harder the fitting becomes and the better the sealing performance becomes. When the pressure of the cleaning liquid is applied to the cylinder when it is completely fitted, the conical shape is formed. Since a force acts in the direction in which the dent of the bulge expands, the sealing performance is further enhanced and no leakage occurs.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a state where a cleaning plug according to an embodiment of the present invention is attached to a cylinder.

FIG. 2 is a side view of the operation portion of the endoscope according to the embodiment of the present invention.

FIG. 3 is a side sectional view of a cylinder portion according to the embodiment of the present invention.

FIG. 4 is a front view of the mouth opening of the cylinder according to the embodiment of the present invention.

FIG. 5 is a side sectional view showing a state where a conventional cleaning plug is attached to a cylinder.

FIG. 6 is a side sectional view showing a state in which another conventional cleaning plug is attached to the cylinder.

[Explanation of symbols]

11,21 cylinders 30 Washing plug 30a, 30b Fitting part 30d, 30e hollow

Claims (3)

(57) [Claims] 1. A pipe passage switching valve element inserted into a cylinder to which a pipe for passing a fluid is connected, is removed from the cylinder, and then fitted into the mouth opening of the cylinder from the outside to form the mouth of the cylinder. In the plug for cleaning the inside of the duct of the endoscope for closing the opening, the portion fitted into the cylinder is formed of a resilient material into a thickness that fits tightly into the cylinder in a deformed state. A plug for cleaning the inside of a conduit of an endoscope, characterized in that a conical recess is formed on the rear end surface of the fitting portion. 2. A pipe line cleaning of an endoscope according to claim 1, wherein when the fitting portion is fitted in the cylinder, the apex of the conical recess is located near the mouth opening of the cylinder. Stopper. 3. The endoscope according to claim 1, wherein a plurality of the cylinders are arranged side by side, and a plurality of fitting portions that are simultaneously fitted into the plurality of cylinders are integrally connected to each other. A pipe cleaning plug.