JP2003310539A - Structure for conduit connecting part of endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure for a conduit connecting part of an endoscope in which the inside of the connecting part is easily and surely cleaned after the endoscope is used without generating a gap wherein a dirty liquid or the like passing through a tube enters while the endoscope is used. <P>SOLUTION: Respective conduit openings of two metallic piping connecting members 15 and 18 formed with the conduit openings on their end faces are located while being mutually confronted, an annular plastic packing 16 is held between the end faces of the two piping connecting members 15 and 18, and the two piping connecting members 15 and 18 are assembled in the state of crushing the packing 16. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a conduit connecting portion of an endoscope.

[0002]

2. Description of the Related Art An endoscope is provided with various pipe lines such as a suction pipe line and a treatment instrument insertion pipe line, and these pipe lines are connected in the middle according to structural needs. There is.

The structure of the conduit connecting portion of such an endoscope is as follows.
It is necessary to have a sealed structure so that the fluid passing through the inside does not leak out. Therefore, generally, two metallic pipe connecting members to be connected are fitted to each other, and a sealing member such as an O-ring is attached to the fitting surfaces (outer peripheral surface and inner peripheral surface).

[0004]

If an O-ring or the like is attached to the fitting surfaces of the pipe connecting members as described above, it is possible to prevent fluid from leaking from the connecting portion. When the filth or the like that passes through the inside of the pipe penetrates from the inner surface of the pipe connecting member, it is not easy to completely clean the portion after using the endoscope.

Therefore, the present invention provides an endoscope capable of easily and surely cleaning the inside of the connecting portion after use of the endoscope without forming a gap such that dirty liquid passing through the tube enters during use of the endoscope. An object of the present invention is to provide a structure of a pipeline connection part.

[0006]

In order to achieve the above-mentioned object, the structure of the conduit connecting portion of the endoscope of the present invention comprises two metal pipe connecting members each having a conduit opening at the end face. Arrange the conduit openings so that they face each other, sandwich an annular packing made of plastic material between the end faces of the two pipe connecting members, and crush the packing to put the two pipe connecting members together. It is assembled.

If the inner hole of the ring-shaped packing is formed to have a size that does not cause a step with respect to the respective conduit openings of the two pipe connecting members, the filth that passes through the pipe during use of the endoscope There is no step that catches things such as.

If the packing is made of a non-rigid fluororesin, it is difficult for the dirty liquid to adhere.

[0009]

Embodiments of the present invention will be described with reference to the drawings. FIG. 3 shows the operation portion 1 of the endoscope, and the base end of the insertion portion 2 is connected to the lower end thereof.

The proximal end of the treatment instrument insertion channel 3 which is inserted and arranged over the entire length in the insertion portion 2 is inside the treatment instrument insertion portion 4 formed so as to project obliquely upward from the vicinity of the connecting portion between the operating portion 1 and the insertion portion 2. Connected to. Reference numeral 10 is a rubber forceps plug.

The suction channel 5 branched from the treatment instrument insertion channel 3 in the vicinity of the base of the treatment instrument insertion portion 4 is a suction operation valve 6 arranged in the upper half of the operation portion 1.
Is connected to the cylinder body 7. Reference numeral 8 is a suction operation button.

FIG. 1 shows the vicinity of the treatment instrument insertion portion 4,
The treatment tool insertion channel 3 is connected to the T-shaped conduit formed in the stainless steel branch connection member 11 (first pipe connection member) via the connection pipe 12 at one end in the penetrating direction. The suction channel 5 is connected to the branch end of the via a connecting pipe 13. 14 is a branch connection member 11
It is a mounting seat of the connection pipe 13 to.

Reference numeral 15 denotes a stainless steel drawing cylinder (second pipe connecting member) inserted from the outside into the lower half of the stepped through hole formed through the treatment instrument insertion portion 4. When the brim formed on the upper end side is caught on the stepped portion of the through hole formed in the treatment instrument insertion portion 4, the pulling tubular body 15 may go deeper than the vicinity of the bottom of the treatment instrument insertion portion 4. I can't do it.

A branch connecting member 11 is attached to the pulling cylinder 15.
A female screw that is screwed with the male screw formed on the front side is formed. By screwing both screws as shown in FIG. It is pulled and fixed in the bottom part of No. 4.

At the respective axial line positions of the end faces of the branch connecting member 11 and the pulling tubular body 15 which face each other, a conduit opening of substantially the same size communicating with the treatment instrument insertion channel 3 is formed face to face. A first annular packing 16 which is not rigid (that is, has at least some flexibility and elasticity) and is made of a fluororesin such as tetrafluoroethylene resin is sandwiched between the two.

The branch connecting member 11 and the pulling cylinder 15 are screwed and connected so as to crush the annular packing 16, and as a result, the branch connecting member 11 is connected.
And the pulling cylinder 15 are connected in a fluid-free state.

The inner hole of the annular packing 16 is formed in such a size that there is substantially no step difference between the branch connection member 11 and the conduit opening of the drawing cylinder 15. Therefore, even if dirty liquid or the like adheres to the inner surface of the connecting portion between the branch connection member 11 and the pulling tube body 15 due to the use of an endoscope or the like, there is no gap or step for the dirty liquid to enter. Reference numeral 17 denotes a fitting surface of the branch connecting member 11 with respect to the pulling tubular body 15 and the pulling tubular body 15 with respect to a through hole formed in the treatment instrument insertion portion 4.
Is an O-ring for sealing the fitting surface of the.

A treatment tool insertion cap 18 (third pipe connecting member) made of stainless steel is screwed into the upper half of the through hole formed in the treatment tool insertion portion 4 near the mouth of the penetration hole. It is pressed and fixed by a presser tube 19.

Pipe line openings of substantially the same size are formed facing each other at respective axial line positions of the end faces of the pulling tubular body 15 and the treatment instrument insertion cap 18 which are opposed to each other.
The second annular packing 20 made of the same material as that of the first annular packing 16 is sandwiched.

Therefore, by tightening the holding tube 19, the annular packing 20 is sandwiched between the holding tube 19 and the drawing cylinder 15 and is crushed, and the drawing tube 15 and the treatment instrument are inserted. The base 18 and the base 18 are connected in a fluid-tight manner.

The annular packing 20 is formed in an annular shape, and the inner hole thereof is formed in a size and shape which does not substantially cause a step with respect to each conduit opening of the pulling cylinder 15 and the treatment instrument insertion cap 18.

Therefore, even if dirty liquid or the like adheres to the inner surface of the connecting portion between the pull-in cylinder 15 and the treatment instrument insertion mouth 18 due to the use of an endoscope or the like, there is no gap or step for the dirty liquid to enter. Reference numeral 21 denotes a treatment tool insertion mouthpiece 1 for the holding tube 19.
It is an O-ring for sealing the fitting surface of No. 8 and the fitting surface of the presser pipe 19 with respect to the through hole formed in the treatment instrument insertion portion 4.

FIG. 2 shows a stainless steel suction connection pipe 3 connected to a connection pipe 31 extending from the cylinder body 7 of the suction operation valve 6 and an external suction tube (not shown).
2 shows a connecting portion with 2 (fourth pipe connecting member). Three
Reference numeral 2a is a tube connection portion formed at the tip of the suction connection pipe 32.

A stainless steel receiving tube 34 (fifth pipe connecting member) attached to the tip of the connecting pipe 31 by brazing or the like is provided with a pointed screw 35 for fixing the base of the suction connecting pipe 32. Is screwed in from the side.

Pipe line openings of substantially the same size are formed facing each other at respective axial line positions of the end faces of the suction connection pipe 32 and the receiving cylinder 34 which face each other, and the first and second annular packings are provided therebetween. A third annular packing 33 made of the same material as 16, 20 is sandwiched.

The tip of the pointed screw 35 engages with the V groove formed in the circumferential direction of the outer peripheral surface of the suction connection pipe 32, so that the suction connection pipe 32 is pushed toward the bottom of the receiving cylinder 34. By tightening the pointed screw 35, the annular packing 33 is sandwiched between the suction connection pipe 32 and the receiving cylinder 34 and is crushed, and the suction connection pipe 32 and the receiving cylinder 34 are fluidized. Connected leak-free.

The annular packing 33 is formed in an annular shape, and the inner hole thereof is formed to have a size that does not cause a step between the suction connection pipe 32 and the receiving pipe 34. Therefore, by using an endoscope or the like, the suction connection pipe 32
Even if dirty liquid or the like adheres to the inner surface of the connecting portion between the receiving cylinder 34 and the receiving cylinder 34, there is no gap or step for the dirty liquid to enter. 36 is an O-ring for sealing.

[0028]

According to the present invention, the two pipe connecting members are assembled in a state in which the packing sandwiched between them is crushed, so that the sewage or the like passing through the pipe may enter during use of the endoscope. Since no gap is formed, the inside of the connection portion can be easily and surely cleaned after using the endoscope.

If the inner hole of the ring-shaped packing is formed to have a size that does not substantially cause a step with respect to the respective pipe line openings of the two pipe connecting members, filth and the like that pass through the pipe during use of the endoscope, etc. Since there is no step to be caught, it is easier to surely clean the connection portion after using the endoscope.

[Brief description of drawings]

FIG. 1 is a side sectional view of the vicinity of a treatment instrument insertion portion according to an embodiment of the present invention.

FIG. 2 is a side sectional view of the vicinity of the suction connection pipe according to the embodiment of the present invention.

FIG. 3 is a side view of the operation portion of the endoscope according to the embodiment of the present invention.

[Explanation of symbols]

1 Operation part 3 treatment instrument insertion channels 11 Branch connection member (pipe connection member) 15 Pulling cylinder (pipe connecting member) 16 ring packing 18 Treatment tool insertion mouthpiece (pipe connection member) 20 ring packing 32 Suction connection pipe (pipe connection member) 33 ring packing 34 Receptacle (Pipe connection member)

Claims (3)

[Claims] 1. A pipe connecting member made of a metal having end faces formed with pipe openings, wherein the pipe opening members are arranged to face each other, and the end faces of the two pipe connecting members are connected to each other. A structure of a pipe line connecting portion of an endoscope, characterized in that an annular packing made of a plastic material is sandwiched between the packings and the two pipe connecting members are assembled in a state where the packing is crushed. 2. The conduit for an endoscope according to claim 1, wherein the inner hole of the annular packing is formed in such a size that there is substantially no step difference with respect to the conduit openings of the two pipe connecting members. Connection structure. 3. The structure of the conduit connecting portion of the endoscope according to claim 1, wherein the packing is made of a non-rigid fluorocarbon resin.