JPH0429619Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a multi-way stopcock, and more specifically, a main body provided with branch pipes protruding in a plurality of different directions;
A valve body having a plurality of passages for communicating predetermined branch pipes with each other and rotatably fitting into the main body, and a concave portion and a convex portion capable of mutually engaging the valve body and the main body. The concave part and the convex part are engaged with each other when the valve body is rotated, so that an operator can easily and surely confirm that the desired branch pipes have communicated with each other. This invention relates to a multi-way stopcock configured to enable.

[Background of the invention] Generally, in the medical field, multi-way stopcocks, for example, three-way stopcocks, are widely used when transfusing blood into a living body or when infusing a medical solution such as glucose or physiological saline into a living body. In other words, in some cases, infusion systems use medicinal solutions that cannot be mixed in advance, and in the case of such medicinal solutions, the desired amount of medicinal solutions is required by operating a three-way stopcock through each tube connected to the three-way stopcock. It is necessary to inject these medicinal solutions into the living body either individually or simultaneously. On the other hand, in blood transfusion systems, three-way stopcocks are effectively used when co-injecting a desired drug solution with blood being transfused, or when performing blood transfusions and transfusions alternately.

Therefore, various proposals have been made regarding this type of three-way stopcock.
The technical idea is disclosed in No. 50385. This is shown in FIGS. 1 and 2.

That is, in FIG. 1, reference numeral 2 indicates a three-way stopcock according to the prior art, and the three-way stopcock 2 has a main body 4, a valve body 6 that rotatably fits into the main body 4, and a lower part of the valve body 6. It includes a lid body 8 that is engaged.
In this case, on the outer periphery of the cylindrical portion 10 constituting the main body 4, branch pipes 12a to 12c are bulged and protruded outward at intervals of 90°, and each of the branch pipes 12a to 12c is It communicates with the inside of the cylindrical portion 10. Further, a fixing protrusion 14 is formed at one end of the cylindrical portion 10 so as to bulge outward in the direction of the axis.

On the other hand, the valve body 6 has a column body part 1 that fits into the cylindrical part 10.
6, and on the outer periphery of the columnar part 16 are provided at the same height as the aforementioned branch pipes 12a to 12c, respectively.
Passages 18a spaced apart at 90° intervals and communicating with each other
18c to 18c are bored. A rotation protrusion 20 is formed in the upper part of the column body 16 to bulge vertically downward, and the rotation protrusion 20 engages with the fixed protrusion 14 to restrict the rotation range of the valve body 6. . moreover,
A lever 22 extending radially outward is provided at the top of the column body 16 .

In such a configuration, as shown in FIG. 2, if the lever 22 is arranged parallel to the branch pipe 12b, the branch pipe 12a and the branch pipe 12c
This leads to communication via passages 18a and 18c formed in the two. Therefore, for example, the branch pipe 12
A branch pipe 12a is connected to the chemical liquid supply pipe connected to c.
A desired chemical solution is supplied to the main body through a conduit (not shown) connected to the main body.

Next, in FIG. 2, the lever 22 is rotated in the direction of the arrow to position it parallel to the branch pipe 12c (see the two-dot chain line in the figure). As a result, the branch pipes 12b and 12a are connected to the passages 18c, 1
8b, and is connected to the branch pipe 12b from another chemical supply pipe (not shown) to the branch pipe 1.
Another drug solution is injected into the main body via 2a.

By the way, in the three-way stopcock 2, the operator rotates the lever 22, and visually aligns the lever 22 parallel to the branch pipe 12b in order to connect the branch pipe 12a and the branch pipe 12c, as described above. It is rotated to the position where it is. For this reason,
The passages 18a and 18c of the valve body 6 are connected to the branch pipes 12, respectively.
The operator cannot confirm whether or not there is reliable communication with c and 12a. Therefore, there are cases where the angular position of the lever 22 becomes inaccurate, resulting in a drawback that it becomes difficult to sufficiently supply a predetermined chemical solution to the subject. As a result, the operator must operate the lever 22 very carefully, which imposes a considerable burden on the operator, and
This exposes the disadvantage that the flow path switching operation cannot be accomplished efficiently.

[Purpose of the invention] The present invention has been made to overcome the above-mentioned disadvantages, and includes a main body having a plurality of branch pipes protruding outward at a predetermined angle, and a main body rotatably fitted into the main body. A valve body having a plurality of passages is provided, and engaging means, for example, an engageable concave part and a convex part or a convex part and a concave part, are formed on the main body and the valve body, and the valve body is rotated. When the concave portion and the convex portion engage with each other by moving the main body, the desired branch pipes of the main body are configured to communicate with each other, whereby the operator can ensure that the desired branch pipes are brought into communication with each other. The fact that the concave portion and the convex portion are engaged or separated can be reliably and easily confirmed through load fluctuations when the concave portion and the convex portion engage or separate,
It is an object of the present invention to provide a multi-way stopcock that avoids poor flow of chemical solutions and the like and enables efficient flow path switching work at once.

[Means for Achieving the Object] The above object is achieved by a cylindrical portion with at least one end open and a plurality of branch pipes protruding outward provided on the outer periphery of the cylindrical portion and spaced apart at a predetermined angle. a main body having a main body, a columnar part that is liquid-tightly and rotatably fitted into the cylindrical part and has a plurality of passages therein; The multi-way stopcock is composed of a valve body having a lever whose one end is exposed to the outside, and which communicates the predetermined branch pipes with each other through a passage in the column body part, It has an outer peripheral part that is in liquid-tight contact with the inner peripheral surface of the cylindrical part, and a small diameter part that is smaller in diameter than the outer peripheral part that is in liquid-tight contact with the inner peripheral surface of the cylindrical part and the column. An annular gap is formed between the outer circumferential surface of the body part, and a concave or convex first engagement part is provided in the small diameter part. The inner circumference of the cylindrical part at a position corresponding to the small diameter part has a convex or concave second engaging part that engages with the first engaging part, and the first and second engaging parts When the engaging portions are engaged, the predetermined branch pipes are brought into communication with each other, and further, by rotating the valve body,
This is a multi-way stopcock in which the engagement states of the first and second engagement portions are released.

[Embodiments] Next, preferred embodiments of the multi-way stopcock according to the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 3, reference numeral 30 indicates a multi-way stopcock, for example a three-way stopcock, according to the present invention. The three-way stopcock 30 has a main body 32 made of a transparent hard resin material.
and a valve body 34 and a lid body 3 made of a hard resin material.
It basically consists of 6.

The main body 32 includes a cylindrical portion 38 oriented in the vertical direction in the figure, and branch pipes 40a to 40c extending radially outward are provided on the outer periphery of the cylindrical portion 38 at intervals of 90°. integrally formed.
In this case, the fluid passages 42a to 42c of the branch pipes 40a to 40c communicate with the inside of the cylindrical portion 38.

Next, as shown in FIGS. 4 and 6 a and b, the inner circumferential surface 44 of the cylindrical portion 38 has convex portions spaced apart at 90° intervals and bulging radially inward at one end edge thereof. 46a to 46d are formed over a predetermined length. The convex portions 46a to 46d have an arcuate cross section, and the centers of the convex portions 46a to 46c and the respective branch pipes 40a to 40c are located at the cylindrical portion 3.
The positions of the respective convex portions 46a to 46d are selected so as to be on the same line with respect to the axial direction of 8. The cylindrical portion 38 also has the convex portions 46a to 46d.
A fixed locking portion 48 is formed at the other end corresponding to the one end provided with the locking portion 48 and protruding outward from the axis.

On the other hand, the valve body 34 is connected to the inner peripheral surface 44 of the cylindrical portion 38.
The columnar part 50 has fluid passages 52a to 52c spaced apart at 90° intervals and communicating with each other at positions corresponding to the respective fluid passages 42a to 42c. drilled. Further, one end edge of the outer periphery of the column body portion 50 is formed to have a small diameter by a predetermined length. That is, as shown in FIGS. 3 and 4, the columnar portion 50 is provided below the lever 56 of the valve body 34.
The valve body 34 is rotatable with respect to the main body (cylindrical portion 38), and has a liquid-tight contact outer circumferential portion that is in liquid-tight contact with the inner circumferential surface of the cylindrical portion 38, and a lower portion of the liquid-tight contact outer circumferential portion. It has a non-contact outer circumferential portion formed to have a smaller diameter than the liquid-tight contact outer circumferential portion which is provided in the liquid-tight contact area. This small diameter portion (non-contact outer peripheral portion) forms an annular gap when the valve body 34 is fitted into the cylindrical portion 38 . and,
A concave or convex first engaging portion is provided on this one end edge (small diameter portion), and the inner peripheral portion of the cylindrical portion at a position corresponding to the small diameter portion of the valve body is provided with a first engaging portion that is concave or convex. A convex or concave second engaging portion that engages with the first engaging means of the body is provided, and when the first and second engaging portions are engaged, the predetermined branch pipes are connected to each other. are configured so that they are communicated with each other.

Specifically, one end edge (small diameter portion) has convex portions 46a to 46 provided on the inner circumferential surface of the cylindrical portion 38.
Concave portions 54a to 54d (first engaging portions) that engage with the second engaging portions d (second engaging portions) are formed over a predetermined length. Therefore, the convex portions 46a to 46
d and the recessed portions 54a to 54d constitute an engaging means 55. By configuring in this way, a state in which the unevenness does not engage (a state in which the first engaging part and the second engaging part do not engage, in other words, a state in which the first engaging part and the second engaging part The liquid-tight state is maintained at the contact portion (liquid-tight contact outer peripheral portion) between the inner circumferential surface of the cylindrical portion 38 and the outer circumferential surface of the column body portion 50 even when the engaged state with the joint portion is released. be able to. Further, the concave portions 54a to 54d have an arcuate cross section, and the radius of curvature of the concave portions 54a to 54d is selected to be smaller than the radius of curvature of the convex portions 46a to 46d (see FIG. 6a). And the column body part 50
The other end is exposed outward from the cylindrical part 38,
A lever 56 extending in a direction opposite to the passage 42a of the column body 50 is provided at the other end (see FIG. 5). Also, one end of the lever 56 on the columnar section 50 side includes passages 52a to 52c of the columnar section 50.
It is preferable to form arrows 58a to 58c indicating the direction.

Note that a rotation locking portion 59 is provided at one end of the lever 56 and bulges vertically downward, and the rotation locking portion 59 engages with the fixed locking portion 48 to limit the rotation range of the valve body 34. regulate.

The three-way stopcock according to the present invention is basically constructed as described above, and its functions and effects will be explained next.

Therefore, as shown in FIG.
One end of the pipes 60a to 60c is connected to the pipes 0a to 40c, for example, the pipe 60a is connected to a living body (not shown), and the other pipes 60b, 6
0c is connected to a chemical solution supply source (not shown).

Next, when the lever 56 is rotated in the direction of the arrow to connect the pipes 60b and 60a, the cylindrical part 38 is inserted into the concave parts 54a to 54d of the columnar part 50 at a position where the lever 56 is parallel to the branch pipe 40c.
The convex portions 46a to 46d of the column body 50 are engaged with each other, and the passages 52a and 52b of the column body 50 are connected to the passage 42.
It is coaxial with b and 42a. For this reason, the pipe line 60b
and 60a are brought into communication, and a desired medical solution is supplied to the conduit 60a via the conduit 60b, and the medicinal solution is injected into a living body (not shown) to which this conduit 60a is connected. Become.

Furthermore, when the pipe line 60c is made to communicate with the pipe line 60a, the lever 56 is rotated and positioned so as to be parallel to the branch pipe 40b. Therefore, the passages 52a and 52c of the columnar body part 50 communicate with the passages 42a and 42c, and another medicinal liquid is injected from the conduit 60a into a living body (not shown) via the conduit 60c.

In this case, according to this embodiment, the convex portions 46a to 46d are formed in the cylindrical portion 38, and the concave portion 54a is formed in the columnar portion 50 that fits into the cylindrical portion 38.
In order to engrave the marks 54d to 54d, the operator presses the lever 56.
When switching the flow path of the three-way stopcock 30 by rotating the three-way stopcock 30, the flow path switching operation can be easily and reliably accomplished.

That is, in FIG. 5, the lever 56 is placed in a position parallel to the branch pipe 40c, and the pipe line 60a is
60b are in communication, the concave portions 54a to 54d of the columnar portion 50 are
Convex portions 46a to 46d formed on the inner circumferential surface 44 of the cylindrical portion 38 are engaged with the cylindrical portion 38. Therefore, when attempting to rotate the lever 56 to communicate the pipes 60a and 60c, the columnar portion 50 in FIG.
rotates in the direction of the arrow to open the respective concave portions 54a to 5.
The convex portions 46a to 46d are disengaged from the convex portion 4d, and the engagement state between the two is released. Therefore, as shown in FIG. 6b, the convex portions 46a to 46d are in sliding contact with the outer circumferential portion of the columnar portion 50, and a rotational load is applied to the fingers of the operator who is rotating the lever 56. It turns out.

Next, when the lever 56 is rotated 90 degrees from the branch pipe 40c to the branch pipe 40b side, the convex part 46a separated from the concave part 54a of the columnar part 50 is inserted into the other concave part 54b of the columnar part 50. The other convex portions 46b to 46d are engaged with the concave portions 54c and 54c, respectively.
4d and 54a at the same time.
As a result, the rotational load acting on the column body portion 50 is reduced all at once, and the load fluctuation is transmitted to the fingers of the operator who is rotating the lever 56.
It can be easily confirmed that 6 has reached the predetermined angular position.

At that time, if the operator attempts to further rotate the lever 56 in the direction of the arrow, the convex portions 46a to 46
d are concave portions 54b, 54c, 54d and 5, respectively.
4a, an increasing rotational load will be applied to the operator's fingers. Therefore, the operator only has to rotate the lever 56 in the direction opposite to the arrow and stop the rotation operation of the lever 56 at the position where the rotational load transmitted to the finger is minimized.

In this way, if the lever 56 is stopped at the position shown by the two-dot chain line in FIG.
2a and 42c are securely connected, and the pipe line 6
It becomes possible to effectively supply a desired chemical solution to the conduit 60a via 0c. Further, in this case, since the radius of curvature of the concave portions 54a to 54d is selected to be smaller than the radius of curvature of the convex portions 46 to 46d, the convex portions 46a to 46d are smaller than the radius of curvature of the concave portion 54a.
There is no possibility that the lever 56 will become unrotatable in a state where it is fitted into the levers 54d to 54d.

In addition, in this embodiment, on the outer circumferential surface of the columnar part 50,
Recessed portions 54a to 54d are formed at intervals of 90°, and convex portions 46a to 46d are provided on the inner peripheral surface of the cylindrical portion 38 to constitute an engaging means 55. However, four convex portions spaced apart at an interval of 90 degrees are formed on the columnar portion 50, and four concave portions are carved on the cylindrical portion 38 so as to be able to freely engage with the four convex portions. It is easy to understand that the same effect can be achieved even if the structure is configured differently.

Furthermore, other engaging means can be used in place of the engaging means 55. This is shown in Figures 7a and b.

That is, in FIG. 7a, a convex portion 60 is formed on the inner circumferential surface of the cylindrical portion 38a, bulging in the radial inward direction, while a convex portion 60 is formed on the outer circumferential surface of the columnar portion 50a.
Concave portions 62a to 62d are provided which are spaced apart at 90° intervals. The convex portion 60 and the concave portions 62a to 62d constitute an engaging means 55a.

In such a configuration, when the columnar body portion 50a is rotated in the direction of the arrow, when the convex portion 60 engages with each of the concave portions 62a to 62d, load fluctuations are transmitted to the operator's fingers, and this As in the first embodiment shown in FIGS. 3 to 6, the operator can easily and reliably confirm that the desired channels are in communication with each other.

Then, in a third embodiment shown in FIG. 7b,
Concave portions 64a to 64d spaced apart at 90° intervals are carved on the inner peripheral surface of the cylindrical portion 38b, and a convex portion 66 protruding outward is formed on the outer peripheral surface of the columnar portion 50b to provide an engaging means. 55b.

Therefore, similarly to the above-mentioned engaging means 55a, when the columnar part 50b is rotated in the direction of the arrow and the convex part 66 engages with each of the concave parts 64a to 64d,
It is possible to notify the operator that predetermined flow paths are communicating with each other through load fluctuations.

[Effects of the invention] As described above, according to the invention, a main body having a plurality of branch pipes and a valve body having a plurality of passages and rotatably attached to the main body have a convex part and a concave part. A concave portion or a concave portion and a convex portion are formed, and the convex portion and the concave portion are configured to engage when the predetermined branch pipes communicate with each other. Therefore, the operator who rotates the valve body can easily detect whether the desired branch pipes are communicating with each other or are blocked through the load fluctuations that act on his fingers when the concave part and the convex part engage. You can know for sure. Therefore, it is possible to avoid the inconvenience that the desired branch pipes are not sufficiently communicated with each other due to poor operation, which is the case when the operator visually rotates the valve body as in the past.
Moreover, the operator does not have to perform the channel switching work extremely carefully as in the past, and the channel switching work can be accomplished efficiently all at once, and the burden on the worker is considerably reduced. The effect is that it becomes possible to do this. Furthermore, an annular gap is provided between the cylindrical inner circumferential surface and the columnar body outer circumferential surface, and uneven engagement means are formed on the inner circumferential surface and outer circumferential surface forming this gap, so that the unevenness does not engage. Even in this case, there is no gap between the mating surfaces of the inner peripheral surface and the outer peripheral surface, and liquid tightness can be maintained.

Furthermore, since the engaging portion between the valve body and the cylindrical part is provided on the small diameter part of the valve body and the inner circumference of the cylindrical part, there is no need to add new parts, and the basic structure of the multi-way stopcock is There is no need to change the shape, and the provision of the engaging portion prevents the multi-way stopcock from increasing in size.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to this embodiment, and can be applied to various different multi-way stopcocks in addition to three-way stopcocks. It goes without saying that various improvements and design changes can be made without departing from the gist of the present invention, such as the number of convex portions and concave portions being able to be increased or decreased as necessary.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a three-way stopcock according to the prior art, FIG. 2 is a plan view illustrating the operation of the three-way stopcock shown in FIG. 1, and FIG. 3 is an exploded perspective view of a three-way stopcock according to the present invention. Figure 4 is a partially sectional front view of the three-way stopcock according to the present invention, Figure 5 is a partially omitted perspective view showing the operating state of the three-way stopcock according to the present invention, and Figures 6 a and b.
4 is a sectional view taken along the line -- in FIG. 4 showing the operating state of the three-way stopcock according to the present invention, and FIGS. be. 30...Three-way stopcock, 32...Main body, 34...Valve body, 36...Lid body, 38...Cylindrical portion, 40a-4
0c...branch pipe, 46a-46d...convex portion, 5
0...Column body part, 52a to 52c...Passway, 54a
~54d... Concave portion, 55, 55a, 55b...
Engagement means, 56...lever.

Claims (1)

[Claims for Utility Model Registration] A main body comprising a cylindrical part with at least one end open and a plurality of branch pipes protruding outward and provided at a predetermined angular distance on the outer periphery of the cylindrical part; and the cylinder. It is fitted liquid-tightly and rotatably inside the section.
The valve body is composed of a columnar portion having a plurality of passages therein, and a lever provided at an end of the columnar portion and exposed outwardly from one open end of the cylindrical portion. A multi-way stopcock that communicates the predetermined branch pipes with each other through a passage in a column body, the valve body having an outer circumferential portion in liquid-tight contact with an inner circumferential surface of the cylindrical portion, and an outer circumferential portion in liquid-tight contact with the inner circumferential surface of the cylindrical portion. a small diameter part having a smaller diameter than an outer peripheral part, the small diameter part forming an annular gap between the inner circumferential surface of the cylindrical part and the outer circumferential surface of the columnar part; The small diameter portion is provided with a concave or convex first engagement portion, and the inner peripheral portion of the cylindrical portion at a position corresponding to the small diameter portion of the valve body is provided with the first engagement portion. A state in which the predetermined branch pipes have a convex or concave second engaging part that engages with the engaging part, and the predetermined branch pipes are communicated with each other in a state where the first and second engaging parts are engaged. The multi-way stopcock is further characterized in that, by rotating the valve body, the engagement states of the first and second engagement portions are released.