JPH0611742U - Connector for fluid conduit connection - Google Patents

Abstract

(57) [Summary] [Purpose] Even fluid conduits of different diameters can be quickly connected in a liquid-tight state, and the fluid conduits will not be twisted during the connection. [Structure] Tapered surface 1 that fits closely to each other
The male side connector member 2 is composed of a pair of male and female connector members 1 and 2 having tubular portions 1b and 2b having e and 2e and connecting portions 1a and 2a for connecting to a fluid conduit at both ends in the axial direction.
The cap nut-shaped coupling member 3 is rotatably attached to the
A male screw portion 1d with which the coupling member 3 is screwed is formed on the outer peripheral surface of the tubular portion 1b of the female connector member 1. At least one of the pair of male and female connector members 1 and 2 is formed in a plurality of types in which only the diameters of the connection portions 1a and 2a with the fluid conduit are different.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fluid conduit connection connector used for fluid-tightly connecting fluid conduits such as a tube of a medical artificial kidney.

[0002]

[Prior art]

 This type of connector for connecting a fluid conduit generally has a pair of male and female connectors that has a connecting portion with a fluid conduit at one end and a tubular portion that can be connected / disconnected to each other by a screw structure or the like at the other end. It is composed of members. In a conventional general connector having such a configuration, a pair of male and female connector members are 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 together. A nut-shaped screw member for connecting and disconnecting a pair of male and female connector members is fixed to the male connector member so as to rotate integrally.

[0003]

[Problems to be solved by the device]

 For that purpose, for example, switching the connection path between one fluid conduit of different diameter size and the other fluid conduit such as a tube of a medical artificial kidney or a bypass tube for heart surgery. Or, when replacing one fluid conduit with another with a different diameter size, the entire connector is replaced with a different diameter. Therefore, in order to support a wide range of diameter sizes, it is necessary to manufacture and prepare multiple types of connectors with different diameter sizes, which increases the cost. Further, there is a drawback 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 blood easily coagulates.

In addition, in the conventional connector, since the nut-shaped screw member is fixed to the male-side connector member, it is difficult to promptly attach / detach, and it is more time-consuming to switch the connection path and further connected. There was a problem that the two fluid conduits were easily twisted.

The present invention has been made in view of the above circumstances, and even fluid conduits having various diameters can be liquid-tightly connected to each other, and two fluid conduits can be connected to each other. It is an object of the present invention to provide a fluid conduit connection connector that can be connected and operated promptly without causing twisting.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, a connector for connecting a fluid conduit according to the present invention has a connecting portion for a fluid conduit at one end and a tubular portion for fitting inside and outside each other at the other end. A connector for connecting a fluid conduit comprising a pair of male and female connector members configured to be connectable and separable with each other, wherein the inner and outer surfaces of the tubular portion of the male and female connector members are formed into tapered surfaces that are in close contact with each other in a fitted state. On the male connector part, a coupling member having a cap nut shape and an internal thread portion on its inner peripheral surface is rotatably attached, while on the outer periphery of the tubular part of the female connector member, A male screw portion is formed by being screwed into the female screw portion of the coupling member to hold the inner and outer tapered surfaces in close contact with each other, and at least one of the pair of male and female connector members. The connector member, the diameter of the connecting portion of the fluid conduit is formed in a plurality of types different.

[0007]

[Action]

 According to this invention, at least one of the connector members has a different diameter at the connecting portion with the fluid conduit, but since the connecting portions between the connector members are common, they are formed in a plurality of types having different diameter sizes. When switching the connection path between one fluid conduit and the other conduit, or when replacing only one fluid conduit with another fluid conduit having a different diameter size, the fluid to be switched or replaced. It is only necessary to select and use one of the connector members having one of the connecting portions having the diameters corresponding to the conduits, and it is not necessary to replace the other connector member.

Moreover, since the cap nut-shaped coupling member is rotatably attached to the male connector member, quick connection operation can be performed without twisting the fluid conduit.

[0009]

【Example】

 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 connection connector according to the present invention in an uncoupled state, FIG. 2 is a longitudinal sectional view showing fluid conduits having the same diameter connected to each other, and FIG. 3 is fluid conduits having different diameters. FIG. 4 is a vertical cross-sectional view showing a state in which is connected.

1 to 3, a pair of male and female connector members 1 and 2 are formed of a hard, preferably transparent synthetic resin. The female connector member 1 has a connecting portion 1a at one axial end thereof with a fluid conduit 10A such as a tube for a medical artificial kidney, and a tubular portion having a larger diameter than the connecting portion 1a at the other end. With 1 b. The inner surface of the large-diameter tubular portion 1b is formed into a tapered surface 1e having a gradient such that the diameter becomes larger toward the open end side of the tubular portion 1b. Further, as shown in FIG. 4, on the outer peripheral portion of the tubular portion 1b, an operating piece 1c protruding outward in the radial direction and a male screw portion 1d formed in a part in the circumferential direction are provided. Has been formed.

On the other hand, the male connector member 2 has a connecting portion 2a at one axial end thereof with a fluid conduit 10B such as a tube of a medical artificial kidney, and at the other end thereof the connecting portion 2a. It has a tubular portion 2b having a larger diameter and fitted in the tubular portion 1b of the female connector member 1. The outer surface of the tubular portion 2b is formed into a taper surface 2e having a slight gradient such that the diameter becomes smaller toward the opening end side of the tubular portion 2b. An annular groove 2c is formed on the outer peripheral portion of the tubular portion 2b at a position closer to the connecting portion 2a side (toward the right), and the base end portion 3a of the cap nut-like coupling member 3 is formed in the annular groove 2c. As shown in FIG. 5, the cap nut-shaped coupling member 3 is rotatably attached to the male-side connector member 2 by fitting.

On the inner peripheral surface of the cap nut-shaped coupling member 3, a female screw portion 3b which is screwed into the male screw portion 1d of the female connector member 1 is formed, and the female screw portion 3b is connected to the male screw portion 1d. By screwing and tightening the connecting member 3, the taper surfaces 1e and 2e of the male and female pair of connector members 1 and 2 are brought into close contact with each other so that both connector members 1 and 2 can be liquid-tightly connected. Has been done.

The connecting portion 1a of the female connector member 1 and the connecting portion 2a of the male connector member 2 each have a knot-shaped form of bamboo, and the fluid conduits 10A, 10A are provided outside the connecting portions 1a, 2a. By pushing and fitting 10B, the inner peripheral surfaces of these fluid conduits 10A, 10B and the respective connecting portions 1a, 2a are brought into close contact with each other, and both 10A, 1a and 10B, 2b are kept in a liquid tight state. It is combined.

Further, the male connector member 2 is different only in the diameter of the connecting portion 2a with the fluid conduit 10B, the diameter of the tubular portion 2b, the gradient of the tapered surface 2e, the diameter of the female screw portion 3b of the coupling member 3 and the screw. Multiple types of joint structures such as pitch are formed in common, and one of them is used.

The fluid conduit connection connector having the above-described structure is configured such that the fluid conduits 1 and 2 are pushed into the respective connection portions 1a and 2a to be fitted to each other, so that the fluid conduits are connected to each other as shown in FIGS. The inner peripheral surfaces of 10A and 10B and the respective connecting portions 1a and 2a are brought into close contact with each other, and both 10A, 1a and 10B and 2b are retained in a liquid-tight and air-tight state so as to be engaged. Here, each of the connecting portions 1a and 2a has a bamboo knot-like shape, and the distance between the knots is substantially flat. Therefore, by tightening this flat portion using an insulock tie or the like, both sides 10A , 1a and 10B, 2b can be ensured in a liquid-tight state.

When connecting the pair of male and female connector members 1 and 2, the tubular portions 1 b and 2 b of both are fitted inside and outside, and then the cap nut-shaped connecting member 3 attached to the male connector member 2 is attached. And the operation piece 1c of the female connector member 1 in their respective hands, and the female screw portion 3b and the male screw portion 1d are screwed together to perform a tightening operation. , 2e are brought into close contact with each other to join the connector members 1 and 2 in a liquid-tight manner. At this time, since the connecting member 3 is free to rotate, the connecting operation can be performed quickly, and since the connector members 1 and 2 do not have to be rotated, the fluid conduits 10A and 10B are not twisted. .

By the way, in the case of, for example, a medical artificial kidney tube, a bypass tube for heart surgery, an extracorporeal circulation breathing assistance tube, or a circulation assistance tube, one fluid conduit 10A or 10B is used as it is. In some cases, only the other fluid conduit 10B or 10A may be replaced with one having a different diameter. In that case, since only the male connector member 2 needs to be replaced, not only is workability superior to the case where both are replaced, but also the contact between blood and a new male connector member that becomes a foreign substance. It is possible to reduce touch and suppress blood coagulation and the like.

Although a plurality of types of male connector members 2 alone are prepared in the above embodiment, a plurality of types of female connector members 1 alone may be prepared. Alternatively, a plurality of types of both connector members 1 and 2 may be prepared. In that 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 restarted. After that, the blood processing can be interrupted again, and the operation of replacing the one connector member while leaving the other collector member as it is.

[0019]

[Effect of device]

 As described above, according to the present invention, the connecting structure of a pair of male and female connector members is configured to be commonly used regardless of the diameter of the connection portion with each fluid conduit. When switching the connection path between one fluid conduit formed in multiple different types and the other fluid conduit, or replacing only one fluid conduit with another fluid conduit having a different diameter size, the switching Alternatively, by selecting one of the plural types of connector member having one of the connecting portions having the diameter corresponding to the fluid conduit to be replaced and using it, the liquid conduit of any diameter can be used. Can be tightly connected. Therefore, regardless of the diameter size of the fluid conduit, the two fluid conduits can be connected promptly.

Moreover, since the cap nut-shaped coupling member is rotatably attached to the male connector member, the fluid conduit is not twisted at the time of connection, and quick connection operation can be performed.

[Brief description of 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 vertical cross-sectional view showing a state where fluid conduits having the same diameter are connected to each other.

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

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

5 is a front view showing the shape of the male connector member as viewed from the left side of FIG. 2. FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Female-side connector member, 1d ... Male screw 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 portion, 10A, 10B ... Fluid conduit.

Claims (1)

[Scope of utility model registration request] 1. An end portion having a connection portion with a fluid conduit, and another end portion having a tubular portion that fits inside and outside each other,
A connector for connecting a fluid conduit, comprising a pair of male and female connector members configured to be connectable and separable from each other, wherein the inner and outer surfaces of the tubular portion of the male and female connector members are formed into tapered surfaces that are in close contact with each other in a fitted state. While the male connector member is rotatably attached with a coupling member having a cap nut shape and an internal thread portion on its inner peripheral surface, the coupling member is provided on the outer periphery of the tubular portion of the female connector member. A male threaded portion for holding the inner and outer tapered surfaces in close contact with each other by being screwed into the female threaded portion, and at least one of the female and male connector members is connected to a fluid conduit. A connector for connecting a fluid conduit, characterized in that it is formed in a plurality of types having different diameters.