JP2581603Y2 - Fluid conduit connector - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector for connecting a fluid conduit, such as a tube of a medical artificial kidney, for fluid-tight connection between fluid conduits.

[0002]

2. Description of the Related Art A connector for connecting a fluid conduit of this kind is
In general, it is composed of a pair of male and female connector members having a connection part to a fluid conduit at one end and a tubular part connectable and separable to each other by a screw structure or the like at the other end. In a conventional general connector having such a configuration, a pair of male and female connector members are both manufactured to have a diameter corresponding to the diameter of the fluid conduit to be connected, so that only fluid conduits of the same size can be connected to each other. A nut-shaped screw member for connecting and separating a pair of male and female connector members from each other is fixed to the male connector member so as to rotate integrally.

[0003]

For this purpose, a plurality of fluid conduits having different diameters, such as a tube for a medical artificial kidney or a tube for bypass during cardiac surgery, are connected to each other. When the connection path is switched between the two or when one fluid conduit is replaced with another fluid conduit having a different diameter, the whole connector is replaced with a different diameter. Therefore, in order to cope with a wide range of diameters, it is necessary to manufacture and prepare a plurality of types of connectors having different diameters, which increases costs. In addition, there is a disadvantage that it takes time to switch the connection path and replace the fluid conduit. In particular, in the case of a tube for extracorporeal circulation of blood, if the entire connector is replaced during blood processing, a contact state with a foreign substance occurs, and a problem that blood is easily coagulated occurs.

[0004] In addition, in the conventional connector, since the nut-like screw member is fixed to the male connector member,
There is a problem that it is difficult to quickly perform the desorption operation, switching the connection path is troublesome, and furthermore, the two connected fluid conduits are likely to be twisted.

The present invention has been made in view of the above circumstances, and even if fluid conduits having various diameters can be connected in a liquid-tight manner, the two fluid conduits are twisted. It is an object of the present invention to provide a fluid conduit connection connector that can be quickly operated without causing any problems.

[0006]

To achieve the above object, according to an aspect of the connector fluid conduit connection according to this invention has a connecting portion, each fluid conduit at one end is connected, each contact
The connecting portion has a single diameter, and has a tubular portion fitted at the other end to the inside and outside of the connecting portion. The connecting portion is a fluid conduit connecting connector comprising a pair of male and female connector members configured to be mutually connectable and separable. The inner and outer surfaces of the tubular portions of the pair of male and female connector members are formed on tapered surfaces that are in close contact with each other in a fitted state, and the male connector member has a cap nut shape and a female screw portion on the inner peripheral surface thereof. On the outer periphery of the tubular portion of the female connector member, a male screw portion for screwing to the female screw portion of the coupling member to hold the inner and outer tapered surfaces in close contact with each other is attached. And at least one connector member of the pair of male and female connector members is one of
If the connector member is a male connector member,
The diameter of the tubular portion and the slope of the tapered surface,
The diameter and thread pitch of the female thread are common with the fluid conduit.
It consists of multiple types that differ only in the diameter of the connection part.
If the connector is a female connector,
Diameter of tubular part and slope of tapered surface, diameter of male screw part
And thread pitch are common and the diameter of the connection
Are different from each other.
Nectar member is single or multiple
Connected to the other connector
You .

[0007]

According to the invention, at least one of the connector members is composed of a plurality of types, and the plurality of types of connectors are provided.
The members differ only in the diameter of the connecting part to which the fluid conduit is connected, but the connecting parts of the connector members are common . here
In the connection part, one connector member is a male connector
If it is a member, the diameter of the tubular part and the slope of the tapered surface
Arrangement, the diameter and thread pitch of the internal thread of the coupling member,
When one connector member is a female connector member
Is the diameter of the tubular part, the slope of the tapered surface,
Diameter and thread pitch. Thus, only the diameter of the connection part
Since the differ connecting portions common, and one of the fluid conduit comprising a plurality of types having different diameters, or switching the connection path between the other conduit, or, only different Another diameters one fluid conduit In the case of replacing with a fluid conduit, one of the connector members having a connection portion having a diameter corresponding to the switching or replacement of the fluid conduit only needs to be selected from one of a plurality of types and used. The components do not need to be replaced. In addition, each connector member
Connection is formed in a single diameter and formed in multiple sizes
Not what is being done.

In addition, since the coupling member in the form of a cap nut is rotatably attached to the male connector member, the connection operation can be performed promptly without twisting the fluid conduit.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a fluid conduit connecting connector according to the present invention in a non-coupled state, FIG. 2 is a longitudinal sectional view showing a state in which fluid conduits of the same diameter are connected, and FIG. It is a longitudinal cross-sectional view which shows the state which connected.

In FIGS. 1 to 3, reference numerals 1 and 2 denote a pair of male and female connector members, which are formed of a hard, preferably transparent synthetic resin. The female connector member 1 has a connecting portion 1a with a fluid conduit 10A such as a tube of a medical artificial kidney at one end in the axial direction, and a tubular portion having a larger diameter than the connecting portion 1a at the other end. 1b
Having. The inner surface of the large-diameter tubular portion 1b is
Is formed on the tapered surface 1e having such a gradient that the diameter becomes larger toward the opening end side. As shown in FIG. 4, on the outer peripheral portion of the tubular portion 1b, there are formed an operation piece 1c projecting radially outward in a blade shape and a male screw portion 1d formed in a part of the circumferential direction. Have been.

On the other hand, the male-side connector member 2 has a connecting portion 2a with a fluid conduit 10B such as a tube of a medical artificial kidney at one end in the axial direction, and the connecting portion 2a at the other end. Also has a large diameter and a tubular portion 2b fitted into the tubular portion 1b of the female connector member 1. The outer surface of the tubular portion 2b has a tapered surface 2 having a slight gradient such that the diameter decreases toward the opening end of the tubular portion 2b.
e. The annular groove 2 is located at a position closer to the connecting portion 2a (rightward) on the outer peripheral portion of the tubular portion 2b.
c is formed, and by fitting the base end 3a of the cap nut-shaped coupling member 3 into the annular groove 2c, the cap nut-shaped coupling member 3 is connected to the male connector member 2 as shown in FIG.
It is freely rotatable.

On the inner peripheral surface of the cap nut-shaped coupling member 3,
A female screw portion 3b screwed to the male screw portion 1d of the female connector member 1 is formed.
Is screwed into the male screw portion 1d, and the connecting member 3 is tightened, whereby the pair of male and female connector members 1,
The two tapered surfaces 1e and 2e are brought into close contact with each other so that both connector members 1 and 2 can be connected in a liquid-tight manner.

The connecting portion 1a of the female connector member 1 and the connecting portion 2a of the male connector member 2 each have a single diameter, but have a bamboo node shape. The fluid conduits 10A, 10B are pushed in and fitted to the outside, so that these fluid conduits 10A, 10B
The inner peripheral surface of each of them is brought into close contact with each of the connection portions 1a and 2a, and
0A, 1a and 10B, 2a are engaged with each other in a liquid-tight manner.

The male connector member 2 is different only in the diameter of the connecting portion 2a for connecting to the fluid conduit 10B.
gradient of b in the radial and tapered surface 2e, coupling structure, such as diameter and screw pitch of the female screw portion 3b of the coupling member 3 comprises a plurality kinds of common, one of which is used.

In the connector for connecting a fluid conduit having the above-described configuration, the fluid conduits 10A, 1A are connected to the respective connecting portions 1a, 2a.
By pushing fitting the 0B, as illustrated in FIGS. 2 and 3, each fluid conduit 10A, the inner peripheral surface of 10B and the connecting portion 1a, in close contact and 2a, both 10A, 1a and 10B, 2a In a liquid-tight and air-tight state. Here, each connecting portion 1a, 2a has a bamboo knot-like shape, and since the space between each knot is almost flat, the flat portions are tightened by using an insulated tie or the like as necessary, so that the two 10A, The liquid-tight state of 1a and 10B, 2a can be ensured.

Then, a pair of male and female connector members 1, 2
In the connection, the two tubular portions 1b and 2b are fitted inside and outside, and then the cap nut-like coupling member 3 attached to the male connector member 2 and the operation piece 1c of the female connector member 1 are respectively connected. By holding in hand and screwing the female screw portion 3b and the male screw portion 1d and performing a tightening operation, the tapered surfaces 1e and 2 of the pair of female and male connector members 1 and 2 are formed.
e, the two connector members 1 and 2 are connected in a liquid-tight manner with each other. At this time, since the connecting member 3 is freely rotatable, the connecting operation can be performed promptly and the connector members 1 and 2 do not need to be rotated.
A, 10B does not need to be twisted.

By the way, in the case of a tube for a medical artificial kidney, a tube for bypass during cardiac surgery, a tube for extracorporeal circulation respiration, and a tube for circulation assistance, one of the fluid conduits 10A or 10B is left as it is. Then, there is a case where only the other fluid conduit 10B or 10A is replaced with a fluid conduit having a different diameter. In this case, since only the male connector member 2 needs to be replaced, not only is the workability better than when both are replaced, but also the contact between the blood and the new male connector member, which is a foreign substance, is improved. It is possible to reduce blood coagulation and the like with a small amount.

In the above embodiment, a plurality of types of the male connector members 2 are prepared.
Only a plurality of types may be prepared. Also, a plurality of types of each of the two connector members 1 and 2 may be prepared, in which case, for example, the blood treatment is interrupted, one connector member is left as it is, the other connector member is replaced, and the blood treatment is resumed, Thereafter, the blood processing is interrupted again, and an operation of replacing one connector member while leaving the other collector member as it is becomes possible.

[0019]

As described above, according to the present invention, the connecting structure of the pair of male and female connector members is configured to be shared irrespective of the diameter of the connecting portion with each fluid conduit. In the case of switching the connection path between one fluid conduit formed of a plurality of types having different sizes and the other fluid conduit, or replacing only one fluid conduit with another fluid conduit having a different diameter size, One connector member having a connection portion having a diameter corresponding to the fluid conduit to be switched or replaced is selected from one of a plurality of types and is used. It can be connected in a liquid-tight manner. Therefore, the two fluid conduits can be quickly connected to each other regardless of the diameter of the fluid conduit.

Further, since the coupling member in the form of a cap nut is rotatably attached to the male connector member, the connection operation can be performed promptly without twisting of the fluid conduit at the time of connection.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a fluid conduit connection connector according to the present invention in an uncoupled state.

FIG. 2 is a longitudinal sectional view showing a state where fluid conduits having the same diameter are connected to each other.

FIG. 3 is a longitudinal sectional view showing a state in which fluid conduits having different diameters are connected to each other.

FIG. 4 is a front view showing a shape when the female connector member is viewed from the right side in FIG. 2;

FIG. 5 is a front view showing a shape when the male connector member is viewed from the left side in FIG. 2;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Female side connector member, 1d ... Male thread part, 2 ... Male side connector member, 1a, 2a ... Connection part, 1b, 2b ... Tubular part, 1e, 2e ... Tapered surface, 3 ... Cap nut-shaped coupling member, 3b ... Female thread part, 10A, 10B ... fluid conduit.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 63-154892 (JP, U) JP-A 13-12165 (JP, Y1) JP-A 62-181960 (JP 1-87391) (JP, U) (58) Field of investigation (Int. Cl. ⁶ , DB name) A61M 1/14 593 A61M 39/02

Claims (1)

(57) [Scope of request for utility model registration] A fluid conduit ( 10A, 10A ) is provided at one end.
B has connection parts 1a and 2a to be connected to each other.
a and 2a have a single diameter, and have a pair of male and female connector members 1 and 2 having tubular portions 1b and 2b fitted to the inside and outside at the other end , and configured to be connectable and separable from each other. A fluid conduit connection connector, wherein the inner and outer surfaces of the tubular portions 1b, 2b of the pair of male and female connector members 1 , 2 are formed on tapered surfaces 1e, 2e which are in close contact with each other in a fitted state;
The male connector member 2 is rotatably attached to a coupling member 3 having a cap nut shape and having a female screw portion 3b on an inner peripheral surface thereof, while the tubular portion 1 of the female connector member 1 is rotatably mounted.
On the outer periphery of b , there is formed a male screw part 1d for screwing with the female screw part 3b of the coupling member 3 to hold the inner and outer tapered surfaces 1e, 2e in close contact with each other, and the pair of male and female connector members. At least one of the connector members 1 and 2 is connected to the male connector.
When it is the heater member 2, the diameter and the
Of the female surface 3e of the coupling member 3
Connection with fluid conduit 10B with common diameter and thread pitch
It consists of a plurality of types that differ only in the diameter of the portion 2a.
When the connector member is female connector member 1,
The diameter of the tubular portion 1b and the slope of the tapered surface 1e,
The diameter and thread pitch of the thread portion 1d are common and the fluid conduit 1
0A and a plurality of types that differ only in the diameter of the connecting portion 1a.
Of any of these multiple types of connector members
One of which is a single or multiple connector
A connector for connecting a fluid conduit, wherein the connector is connected to a collector member .