JPH0199568A - Stopcock - Google Patents

Abstract

PURPOSE:To obtain a disposable stopcock rich in operability with low cost, by providing both end opening of a through-hole piercing the axial core of the case, elastomer, and cap, and by opening and closing the through-hole of the elastomer by variation in degree of clamping of the screw-fit part. CONSTITUTION:When cap 3 is turned around case 2 in the direction of clamping of screws 2a, 3a, projection 3b presses elastomer 4 while sliding on the inner surface of case 2. Thereby, the elastomer 4 is compressed to deformation, resulting in stoppage of the through-hole 6. On the other hand, when the cap 3 is rotated around the case 2 in the direction of loosening of the screws 2a, 3a, the elastomer 4 restores its original shape by elasticity of its own, and the through-hole 6 opens. In this manner, the opening/closing actions of the stopcock are achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a stopcock for opening and closing a fluid flow path, and is used for several blood A-distortion applications.

(B) Prior Art Conventionally, in this type of stopcock, a flow path is opened and closed by a valve, and the opening and closing operations are performed by a cock-type handle connected to the valve.

(c) Problems to be Solved by the Invention However, in a stopcock having such a cock-type handle, the operating mechanism for operating the valve is complicated, and the stopcock itself becomes large. There was a problem in that the lubricant leaked out or eluted into the fluid, reducing operability. Furthermore, there was also the problem that the cock-type handle could be accidentally touched by two hands or a foreign object, resulting in erroneous operation.

The present invention has been made in consideration of the above circumstances, and aims to provide an inexpensive, disposable stopcock that is simple in structure, highly operable, and prevents erroneous operation.

(d) Means for Solving Problems This invention provides a bottomed cylindrical case with a screw formed on the outer periphery of the open end, and a bottomed cylindrical case with a screw formed on the inner periphery of the open end and screwed on the open end of the case. A cylindrical cap with a bottom that is attached to the case, a cylindrical rubber-like elastic body filled inside the case, and when the cap is screwed onto the case, it slides on the inner surface of the case and presses the elastic body. a columnar protrusion coaxially with the cap and integrally provided on the inner bottom surface of the cap, and a through hole passing through the axis of the case, the elastic body, the protrusion, and the cap; It has a connection part that is integrally provided on the outer surface of each bottom of the cap and connects a pipe body from the outside to the openings at both ends of the through hole, and the through hole of the direct elastic body can be adjusted by changing the degree of tightening of the threaded part. It is a stopcock characterized by being opened and closed.

(E) When the threaded portion between the working case and the cap is strongly tightened, the elastic body is pressed and deformed by the protrusion, and the through hole thereof is closed. Also, when the screwed part is loosened, the pressing force of the protruding part decreases, so the elastic body returns to its original shape.
The through hole is opened.

(f) Examples The present invention will now be described in detail based on examples shown in the drawings. This invention is not limited by this.

FIG. 1 is a cross-sectional view showing one embodiment of this invention ρj, and ■
2 is a stopper body, 2 is a bottomed cylindrical case with a screw 2a formed on the outer periphery of the open end, and 3 is a bottomed cylindrical case with a screw 3a formed on the inner periphery of the open end, which is screwed onto the open end of the case 2. 4 is a cylindrical elastic body filled in the inside of the case 2 and made of silicone rubber; 4a is a locking piece that locks the end of the elastic body 4 in a groove provided on the inner peripheral surface of the bottom of the case 2; 3b is a columnar projection integrally provided on the inner bottom surface of the cap 3 so as to slide on the inner surface of the case 2 and press the elastic body 4 when the cap 3 is screwed onto the case 2; Through holes 8 and 9 pass through the axes of the case 2, the elastic body 6, and the cap 7, respectively, and connections 8 and 9 are provided on the external bottom surfaces of the case 2 and the cap 3, respectively, to connect the pipe bodies to the through holes 5 and 7 from the outside. 8a is a male threaded portion provided on the outer peripheral surface of the connecting portion 8; 8b is a tapered opening provided at the axis of the connecting portion 8; 9;
9b is a convex portion having an opening parallel to the through hole 7 as its axis and having a tapered portion on the outer peripheral surface.

In such a configuration, when the cap 3 is rotated around the case 2 in the direction in which the screws 2a and 32L are tightened, the protrusion 3b slides on the inner peripheral surface of the case 2 and presses the elastic body 4. . As a result, as shown in FIG. 2, the elastic body 4 is compressed and deformed, and the through hole 6 is closed. Also, the screw 2a.

3ah< When the cap 3 is rotated around the case 2 in the loosening direction, the elastic body 4 restores its original shape due to its elasticity and the through hole 6 opens as shown in FIG. In this way, the stopcock I is opened and closed.

Figure 3 shows tube 10.11 connected to connection 8.9 of stopcock ■.
2 is an explanatory diagram showing a state in which the tubes 10 and 10 are connected, and the connecting portion 8 is fixed by a connecting tool 10a provided at the end of the tube 10 and provided with a bag-shaped nut 10b having a tapered tip. Further, the tube 11 is fixed to the connecting portion 9 by a connecting tool 11a having a tapered opening and having a male thread on the outer periphery of the tip. In this condition, tube I
The fluid flowing between O and 11 is passed through or blocked by rotating the cap 3 around the case 2 as described above.

Note that screws 2a and 3 screw together the case 2 and the cap 3.
The thread pitch a is preferably set so that the through hole 6 of the elastic body 4 is opened and closed by rotating the cap 3 about half a turn around the case 2.

Further, in this embodiment, the connecting portions 8.9 use a connection method called a luer lock method or a taper connection method, but the present invention is not limited to these methods.

Further, the case 2 and the cap 3 are preferably made of a transparent material, such as Nismezoica V (manufactured by Tsukimizu Chemical Industry Co., Ltd.), so that the open/closed state of the stopcock I can be visually confirmed.

Moreover, although only the opening and closing operations of the stopcock I have been explained above, by adjusting the screwing state of the cap 3 to the case 2, the opening area of the through hole 6 of the elastic body 4 can be adjusted, thereby making it possible to adjust the flow rate. Needless to say, it will happen.

(g) Effects of the Invention According to the present invention, a stopcock that is simple in structure, compact in shape, excellent in operability, disposable, and sanitary is provided.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention, FIG. 2 is an explanatory diagram showing the operation of the embodiment shown in FIG. 1, and FIG. 3 is a diagram showing a connecting portion of the embodiment shown in FIG. It is an explanatory diagram. l... Stopcock, 2... Case, 3... Cap, 4...
・Elastic body, 5.6.7...Through hole, 8.9...
...Connection part, 2a, 3a...screw,
3b...Protrusion. Procedural amendment January 6, 1986

Claims (1)

[Claims] 1. A bottomed cylindrical case with a screw formed on the outer periphery of the open end, a bottomed cylindrical cap with a screw formed on the inner periphery of the open end and screwed onto the open end of the case, and the case. A cylindrical rubber-like elastic body filled inside, and integrally attached to the inner bottom surface of the cap coaxially with the cap so as to slide on the inner surface of the case and press the elastic body when the cap is screwed onto the case. a through hole that is formed of a columnar protrusion provided in the case and that passes through the axes of the case, the elastic body, the protrusion, and the cap; and a through hole that is integrally provided on the outer bottom surfaces of the case and the cap. A stopcock having connecting portions for connecting a pipe body from the outside at both end openings of the stopcock, and a through hole of the elastic body being opened and closed by changing the degree of tightening of the threaded portion.