JP2002095744A - Flow rate regulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flow rate regulator in which retention of liquid in the regulator is avoided and regulation of flow rate is easily performed. SOLUTION: A flow rate regulator 200 has a conduit 1, a cylindrical first partition wall 2 installed in the conduit 1, a closing part 3 installed as winding a downstream of the first partition wall 2, and a second partition wall 65 composed of a circular flow stopping part 66 and a pipe 67. A ditch 10 installed in an outer wall of the closing part 3. According to a sliding operation for a regulation operating member, the closing part 3 is pushed and opening and closing volumes of the ditch 10 is regulated by which a flow volume according to opening and closing volumes of the ditch 10 is obtained and drug liquid or the like flows to a solid line arrow direction in Fig. 2 through a first flow path 51, a second flow path 52, and a third flow path 53 in order. A slit 5 is installed at an end of an upstream of the first separate wall 2. In the case the flow rate is increased, the slit part is pinched with finger to open the slit 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow controller used for adjusting a flow rate of a liquid such as a drug solution or blood.

[0002]

2. Description of the Related Art In a transfusion set, a blood transfusion set and other medical instruments, it is necessary to control the flow rate of a liquid such as a drug solution or blood flowing in a tube. It is well known that a flow regulator is mounted in the middle of these tubes for that purpose.

[0003] A typical example of this flow controller is:
For example, there is a roller type clamp (roller clamp) as disclosed in Japanese Patent Publication No. 58-22224.
This roller clean is composed of a main body and a roller movably mounted on the main body.The tube is sandwiched between the outer peripheral surface of the roller and the bottom of the main body with a moderate inclination, and by moving the roller The flow rate of the liquid is adjusted by changing the degree of pinching the tube.

However, according to this roller clamp, the constricted portion of the flexible tube is strongly pressed against a small cross-sectional area, so that the cross-sectional shape of the constricted portion changes with time, thereby reducing the opening area of the tube. There is a problem that the flow rate gradually decreases.

[0005] In addition, in this roller clean, a technique for moving the above-mentioned roller delicately is required, so that adjusting the flow rate is troublesome and requires skill. Recently, the number of scenes in which the patient or his / her family performs this procedure has been increasing, and a flow controller which can be easily adjusted even by a beginner is required.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a flow controller which can easily adjust the flow rate and can prevent the liquid from staying.

[0007]

This and other objects are achieved by the present invention which is defined below as (1) to (16).

(1) A flow controller comprising: a deformable pipe having a liquid flow path therein; and a flow control section provided in the middle of the pipe to control the flow rate of the liquid. A first flow path, a second flow path, and a third flow path formed by a partition provided in the flow rate control unit; and a closing unit that closes the first flow path or the second flow path. A groove having a variable cross-sectional area for flowing the liquid stopped by the closing means, the first flow path, the second flow path,
The liquid flows in the order of the first flow path and the third flow path,
In the flow path, the liquid is configured to flow toward the upstream side of the first flow path.

(2) A flow controller having a deformable conduit having a liquid flow path therein, and a flow controller provided in the middle of the conduit and controlling a flow rate of the liquid. A first flow path, a second flow path, and a third flow path formed by a partition provided in the flow rate control unit; and a closing unit that closes the first flow path or the second flow path. A groove having a variable cross-sectional area for flowing the liquid stopped by the closing means, the first flow path, the second flow path,
The liquid flows in the order of the third flow path and the third flow path.
In the flow path, the liquid is configured to flow toward the upstream side of the second flow path.

(3) The flow controller according to (2), wherein the second flow path is configured so that the liquid flows toward an upstream side of the first flow path.

(4) The partition forming the third flow path is made of a hard material as described in (1) to (3) above.
The flow controller according to any one of the above.

(5) The first flow path, the second flow path, and the third flow path are concentric with each other and extend from the center toward the outer peripheral side. The flow controller according to any one of (1) to (4), wherein the flow path is arranged in the order of the second flow path and the first flow path.

(6) A valve section which can communicate the third flow path with the flow path on the upstream side of the flow rate control section near the boundary between the second flow path and the third flow path. The flow controller according to any one of (1) to (5), further comprising:

(7) A dome-shaped partition is provided near a boundary between the second flow path and the third flow path, and the partition has the third flow path and the flow control section. The flow controller according to any one of the above (1) to (5), further comprising a valve portion that can communicate with the upstream flow path.

(8) The flow controller according to the above (6) or (7), wherein the valve portion is configured to be opened by applying pressure to the valve portion from outside the pipeline.

(9) The flow controller according to any one of (6) to (8), wherein the maximum flow rate in the valve section is larger than the maximum flow rate in the groove section.

(10) The flow controller according to any one of (1) to (9), wherein the groove is provided near the closing means or the closing means.

(11) The flow controller according to any one of (1) to (10), wherein one of the grooves is provided.

(12) The flow controller according to any one of (1) to (11), further comprising an opening / closing amount adjusting means for adjusting the opening / closing amount of the groove.

(13) The opening / closing amount adjusting means applies pressure to the member provided with the groove,
The flow controller according to the above (12), which is configured to adjust an opening / closing amount of the groove.

(14) The opening / closing amount adjusting means is slidably provided along the axial direction of the conduit, and applies a pressure corresponding to the sliding operation to a member provided with the groove. The flow controller according to the above (12), which is configured to adjust an opening / closing amount of the groove.

(15) The opening / closing amount adjusting means is provided rotatably along the circumferential direction of the pipeline, and applies a pressure corresponding to the rotation operation to a member provided with the groove, The flow controller according to the above (12), which is configured to adjust an opening / closing amount of the groove.

(16) An infusion / blood transfusion set comprising the flow controller according to any one of (1) to (15).

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a flow controller according to the present invention will be described in detail based on a preferred embodiment shown in the accompanying drawings.

[First Embodiment] (Configuration of First Embodiment) FIG. 1 is a side view (partially vertical sectional view) showing a flow rate controller according to a first embodiment of the present invention. FIG. 2 is a longitudinal sectional view showing a state in which an adjusting operation member of the flow controller according to the first embodiment of the present invention is removed.

In FIGS. 1 and 2, the upper side is the upstream side (the base end side of the pipeline), and the lower side is the downstream side (the distal end side of the pipeline). Chemical liquid (liquid)
A liquid medicine bag (transfusion bag) in which is sealed or a blood bag in which blood for blood transfusion is connected via a conduit 1 and a tube, etc., and for example, an injection needle for puncturing a blood vessel of a patient is provided on the downstream side. It should be understood that they are connected via a pipe 1 and a tube or the like. That is, the flow controller,
Infusion / transfusion set for performing infusion or blood transfusion (not shown)
Shows the case where it is incorporated in

The flow controller 200 adjusts the flow rate of a liquid such as a medical solution or blood to be infused or transfused into the patient from the medical solution bag or the blood bag. 1 and a flow control unit 9 provided in the middle of the pipeline 1 to control the flow rate of the liquid.

The flow rate adjusting section 9 is provided on the first cylindrical wall 2 having a substantially cylindrical shape (the end on the upstream side is closed) and on the outer periphery on the downstream side of the first bulkhead 2 and will be described later. First flow path 5
1, a second partition 65 made of a hard material, and an opening / closing amount of a groove 10 (described below) provided in the closing part 3. An adjusting operation member (opening / closing amount adjusting means) 4 for adjusting (controlling) the area (cross-sectional area) in the cross section.

The conduit 1 is preferably relatively soft and capable of being elastically deformed. As a constituent material of the conduit 1, for example, silicone rubber, natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, butyl rubber,
Various rubbers such as fluorine rubber, various resins such as polypropylene, polyethylene, vinyl chloride resin, fluorine resin, acrylonitrile-butadiene-styrene copolymer (ABS resin) and the like can be mentioned. In addition, the conduit 1 is preferably transparent (having light transmittance) so that air bubbles and the like in the flow path can be visually recognized (confirmed) from the outside. The outer diameter of the first partition 2 is set smaller than the inner diameter of the conduit 1.

In FIGS. 1 and 2, the first partition 2 and the closing portion 3 are each composed of one component (member), but the number of these components is not particularly limited.

Further, the first partition 2 and the closing part 3 may be constituted by one component (member), or the first partition 2 and the closing part 3 may be integrated.

The second partition 65 has a substantially annular shut-off portion 66 having an outer diameter substantially equal to the inner diameter of the conduit 1 and an outer diameter smaller than the inner diameter of the first partition 2. , And a substantially cylindrical pipe 67 integrally formed with the flow stop portion 66 so as to be coaxial with the flow stop portion 66.

The shut-off portion 66 is located downstream of the first partition 2 and the closing portion 3 and is spaced from the first partition 2 and the closing portion 3 by a predetermined distance. The outer wall of the flow stop portion 66 is fixed or adhered to the inner wall of the pipeline.

The pipe 67 is located inside the first partition 2 except for the downstream end. The upstream end of the pipe 67 is located near the upstream end of the first partition 2.

In FIGS. 1 and 2, the second partition 65 is formed of one component (member). However, the number of components is not particularly limited. 67 and 67 may each be constituted by one component (member).

In the conduit 1, the first partition 51 and the second partition 5 are formed by the first partition 2 and the second partition 65.
2 and the third flow path 53 are formed such that the liquid flows in the order of the first flow path 51, the second flow path 52, and the third flow path 53.

The first flow path 51, the second flow path 52, and the third flow path 53 are concentrically (coaxially) and extend from the center toward the outer peripheral side. Second channel 5
2, the first flow path 51 is arranged in this order.

In the first flow path 51, the liquid flows toward the distal end of the pipe 1 (downstream of the pipe 1), and in the second flow path 52, the liquid flows in the first flow path 51. In the third flow path 53, the air flows toward the upstream side, and in the third flow path 53, flows toward the upstream side of the second flow path 52, that is, toward the distal end side of the pipeline 1 (downstream side of the pipeline 1).

In other words, the direction of the liquid flow in the first flow path 51 and the direction of the liquid flow in the third flow path 53 are the same, and the flow of the liquid in the first flow path 51 is the same. The direction and the direction of the liquid flow in the second flow path 52 are configured to be opposite to each other.

As a constituent material of the second partition 65 (particularly, the pipe 67), for example, a polymer material such as polycarbonate, polypropylene, nylon, acrylonilyl-butadiene-styrene copolymer (ABS resin), vinyl chloride resin, and polysulfone And metal materials such as aluminum, titanium, duralumin, and stainless steel. Further, the second partition 65 (particularly, the pipe 67) is preferably transparent (having light transmittance) so that air bubbles and the like in the flow path can be visually recognized (confirmed) from the outside.

The upstream end of the first partition 2, that is, the vicinity of the boundary between the second flow path 52 and the third flow path 53 in the first partition 2, is a dome that is convex on the upstream side. (Curved so that the upstream side is convex).

A slit 5 that can be opened and closed and is normally closed is provided at the vertex of the upstream end of the first partition 2. The portion of the first partition 2 where the slit 5 is provided is a valve portion. When the slit 5 is opened, the third flow path 53 and the flow path (pipe The flow path (flow path on the upstream side of the flow control unit 9) in the path 1 communicates with the flow path. The maximum flow rate in the valve section is larger than the maximum flow rate in the groove section 10.

The constituent material of the first partition 2 is, for example, polypropylene, polyethylene, vinyl chloride resin,
Various resins such as a fluorine resin and an acrylonitrile-butadiene-styrene copolymer (ABS resin), and various rubbers such as a silicone rubber, a natural rubber, an isoprene rubber, a butadiene rubber, a styrene-butadiene rubber, a butyl rubber, and a fluorine rubber. Further, a portion (valve portion) of the first partition 2 near the slit 5 is preferably made of an elastic body. Further, the first partition 2 is preferably transparent (having light transmittance) so that air bubbles and the like in the flow path can be visually recognized (confirmed) from the outside.

As will be described later, when the portion (valve portion) of the first partition 2 where the slit 5 is provided is sandwiched between the fingers along with the pipe line 1 and pressed, the slit 5 which is normally closed is normally closed. As a result of this external pressure (pressing force), the opening state is established, and as shown by the dotted arrow in FIG. The road 53 starts to flow.

In the flow controller 200, the adjustment operation member 4 is operated to operate a groove 1 described later provided in the closing portion 3.
The flow rate of the drug solution or blood is adjusted by controlling the opening / closing amount of 0, but when it is desired to temporarily increase the flow rate of the drug solution or the like,
By pinching the slit 5 portion of the first partition 2 with a finger, the slit 5 can be opened to easily increase the flow rate of a drug solution or the like.

FIG. 3 is a perspective view showing the closing portion 3 mounted on the first partition 2, and FIG. 4 is a diagram showing the pipeline 1 and the first partition 2.
And FIG.

As can be seen from FIGS. 3 and 4, the closing part 3 is provided so as to be wound around the lower part of the first partition 2 (downstream from the slit 5). The portion is provided with a groove 10 having a substantially V-shaped cross section. The groove 10 extends from the upstream end to the downstream end of the closing part 3 along the flow direction (axial direction) of the conduit 1.

The closing portion 3 having the groove portion 10 has an appropriate hardness capable of stably forming (holding) the flow path,
It is preferable to have a moderate flexibility that can be elastically deformed. Examples of the constituent material of the closing portion 3 include various resins such as polypropylene, polyethylene, vinyl chloride resin, fluororesin, and acrylonitrile-butadiene-styrene copolymer (ABS resin). Further, it is preferable that the closing portion 3 has a high elongation at the yield point, a large tear strength, and excellent creep resistance. In addition, the closing part 3
In order to be able to visually check (confirm) air bubbles and the like in the flow channel from the outside,
It is preferably transparent (having a light transmitting property).

When such a closed portion 3 is provided in the conduit 1 together with the first partition 2, the outer peripheral wall of the closed portion 3 and the inner peripheral wall of the conduit 1 come into close contact as shown in FIG. Therefore, the first flow path 51 other than the groove 10 is closed,
Since the closing portion 3 is provided with the groove 10, the liquid medicine or the like in the pipe 1 flows downstream through the groove 10. The flow controller 200 controls the flow rate of the chemical solution or the like by controlling the opening / closing amount of the groove 10 by the adjustment operation member 4 described below.

The constituent material of the adjusting operation member 4 is preferably a hard material so that the amount of deformation of the flow path members such as the pipe 1, the first partition 2, the closing part 3 and the like can be reliably controlled.
Examples include various polymer materials such as polycarbonate, polypropylene, nylon, acrylonitrile-butadiene-styrene copolymer (ABS resin), vinyl chloride resin, and polysulfone, and various metal materials such as aluminum, titanium, duralumin, and stainless steel. The adjustment operation member 4 is hard and is hardly deformed. However, the adjustment operation member 4 is transparent (has light transmittance) so that air bubbles and the like in the flow path can be visually recognized (confirmed) from the outside. Is preferred.

FIG. 5 is a side view of a flow controller 200 provided with the adjusting operation member 4. As can be seen from FIG. 5, the adjusting operation member 4 is provided integrally with the winding portion 14 provided in a manner wound around the pipeline 1, and is formed integrally with the winding portion 14. (Operation direction) provided along the direction.

A pair of first and second undulating portions (projections) 6 and 7 are provided in the operation portion 15 and the conduit 1.

The operator places his / her finger on the first undulating portion 6 provided on the adjusting operation member 4 and also puts on the second undulating portion 7 provided on the pipe 1 and in this state, One finger is moved along the longitudinal direction of the conduit 1 with respect to the other finger. Thereby, the adjusting operation member 4 slides along the longitudinal direction of the pipeline 1. Thus, the first and second
The adjusting operation member 4 can be easily slid by the undulating portions (projections) 6 and 7.

A scale 12 indicating the flow rate of a chemical solution or the like is provided on the winding portion 14 of the adjustment operation member 4 at a position where the adjustment operation member 4 is not hidden by the operator's hand when the adjustment operation member 4 is slid. . On the pipe 1 side (for example, the closing portion 3), a pointer 13 pointing to the scale 12 is provided in response to a slide operation of the operator.

In FIG. 5, the pointer 13 is indicated by a dotted arrow, but the pointer 13 is provided on the pipe 1 side.
Shows a state visually observed through the adjustment operation member 4 formed of the transparent member described above. Therefore, it should be understood that, in practice, the pointer 13 is provided on the pipe line 1 side so as to be clearly visible by, for example, printing or engraving.

Although the adjusting operation member 4 is formed of a transparent member, if the scale 12 and the pointer 13 can recognize the flow rate of the chemical solution or the like corresponding to the slide operation amount, the adjusting operating member 4 is formed. May be formed of an opaque member.

FIG. 6 is a longitudinal sectional perspective view of the adjusting operation member 4,
FIGS. 7A and 7B are cross-sectional views of the winding portion 14 in a state where the adjustment operation member 4 is mounted on the pipeline 1.

As can be seen from FIGS. 6 and 7 (a) and (b), the pipe 1, the first partition 2 and the closing part 3 are provided on the inner peripheral wall of the winding part 14 of the adjusting operation member 4. A pair of ribs 20 and 21 for applying (pressing) pressure to the pair are provided. Specifically, as shown in FIG.
Is provided (obliquely) so as to have a predetermined angle with respect to a straight line (shown by a dotted line in FIG. 6) along the longitudinal direction of the winding portion 14, and the other rib 21 is They are provided so as to face each other.

Therefore, when the adjusting operation member 4 is slid, a force (pressing force) acts on the pipeline 1, the first partition 2 and the closing portion 3 by the ribs 20, 21 in accordance with the sliding operation. Is changed (moved) in the circumferential direction of the pipeline 1.

The ribs 20 and 21 are connected to the winding portion 1
4 may be provided spirally with respect to the inner peripheral wall.

The heights of the ribs 20 and 21 may be the same from one end to the other end, but may be different from one end to the other end. By providing the height difference, the relationship between the operation amount of the adjustment operation member 4 and the flow rate of the chemical solution or the like can be set freely (to any relationship).

When such an adjusting operation member 4 is mounted on the conduit 1, as shown in FIGS.
At 21, the pipeline 1 is pressed. In this state, when the adjusting operation member 4 is slid, the respective ribs 20 and 21 are moved.
Changes the pressing position of the pipeline 1 by the pressure. This flow controller 20
0 changes the state of the groove 10 (opening / closing amount) between the fully open state shown in FIG. 7A and the fully closed state shown in FIG. It can be adjusted to any state.

(Operation (Operation) of First Embodiment) Next, the operation (operation) of the flow controller 200 having the above-described configuration according to the first embodiment will be described. In addition,
Hereinafter, a description will be given of an example in which a predetermined medical solution is infused into a patient using the infusion / blood transfusion set having the flow rate controller 200.

A chemical solution bag is connected to the pipe 1 on the upstream side of the flow controller 200 via, for example, a tube (not shown), and a tube (not shown) is connected to the pipe 1 on the downstream side. The injection needle is connected via the. Then, the injection needle is punctured into a blood vessel or the like of a patient, for example,
The chemical bag is placed (held) higher than the patient's arm
Have been. That is, the medicinal solution contained in the medicinal solution bag is removed from the medicinal solution bag by a tube and a flow controller 20.
0, flowing through the tube to the injection needle, or
It is in a state where it can flow.

The pointer 13 provided on the pipe line 1 shown in FIG.
7 indicates that the flow rate of the scale 12 provided on the adjustment operation member 4 is zero, the ribs 2 provided on the winding portion 14 of the adjustment operation member 4 as shown in FIG.
The pipeline 1, the first partition 2 and the closing portion 3 are pressed so that the groove 10 of the closing portion 3 is completely closed by 0 and 21.
For this reason, as shown in FIG. 1, the chemical solution flowing from the chemical solution bag through the tube and the conduit 1 and flowing through the first flow path 51 is
The groove portion 10 is stopped by the fully closed closing portion 3 and does not flow at all downstream (minimum flow rate).

As will be described later, unless an external pressing force is applied to the vicinity of the slit 5 (valve portion) provided on the upstream side of the first partition 2 by pinching with a finger or the like, the slit 5 Not open (closed). For this reason, for example, even if the adjusting operation member 4 is slid, the slit 5 does not enter the open state.

Next, a finger is put on the first undulating portion 6 provided on the operating portion 15 of the adjusting operation member 4 shown in FIG. In this state, the one finger is moved with respect to the other finger along the longitudinal direction of the conduit 1 so that the pointer 13 points to the scale 12 indicating a desired flow rate. 4
Is operated to slide along the longitudinal direction of the pipeline 1.

In accordance with this sliding operation, each rib 20,
By 21, the direction (position) of applying a load (force) to the pipeline 1, the first partition 2 and the closing part 3 rotates (moves) around the axis of the pipeline 1. Therefore, the sliding operation of the adjusting operation member 4 causes the opening and closing state of the groove 10, that is, the groove 1.
The opening / closing amount (cross-sectional area) of 0 changes.

The scale 12 indicates the flow rate of a chemical solution or the like corresponding to the opening / closing amount of the groove 10. Therefore, by sliding the adjusting operation member 4 so that the pointer 13 indicates the desired scale 12, the opening and closing amount of the groove 10 can be adjusted so that a desired flow rate of the chemical solution flows.
The positions of the ribs 20 and 21 and the opening / closing amount of the groove 10 shown in FIG. 7A indicate a state in which the groove 10 is fully opened (maximum flow rate).

When the opening / closing amount of the groove 10 is adjusted in this manner, a chemical solution having a flow rate corresponding to the adjusted opening / closing amount of the groove 10 flows through the groove (flow path) 10.

That is, the chemical that has flowed in the pipe line 1 from the upstream side first flows from the upper side to the lower side in FIG. 2 along the first flow path 51, passes through the groove 10, Channel 5 of
Flow into 2. Next, the chemical liquid flows along the second flow path 52 in the opposite direction, that is, from the lower side to the upper side in FIG. 2, flows into the third flow path 53, and then flows into the third flow path 53. 2 flows in the opposite direction from the above, that is, from the upper side to the lower side in FIG. Then, the medicinal solution is administered to the patient via the injection needle.

FIG. 8 is a cross-sectional view of the flow controller 200, in which the upstream pipe 1 is cut along a plane perpendicular to its axis, and the slit of the first partition 2 is cut through this cut plane. 5 shows a state in which an end on the upstream side where 5 is provided is viewed.

As can be seen from FIG. 8, the first partition 2
When viewed from the axial direction of the pipeline 1 (when viewed in the cross section of the pipeline 1), the upstream end (valve portion) of the
They are in contact with each other in a pinched manner. That is, when viewed from the axial direction of the pipe 1, the outer shape of the upstream end of the first partition 2 is such that the pressing force from the inner peripheral wall of the pipe 1 (pressure of the pipe 1) is at the end. It has a substantially elliptical shape large enough to be added.

The direction of the slit 5 is set so that the pressing force from the inner peripheral wall of the pipeline 1 acts in the direction in which the slit 5 closes. That is, when viewed from the axial direction of the pipeline 1, the slit 5 is located substantially on the minor axis (minor axis) of the ellipse.

Here, after the flow rate adjustment as described above, a large amount (quickly) of a chemical solution may be temporarily (flushed), for example, in repriming at the time of replacing the chemical solution. In this case, the operator sandwiches the end (valve portion) on the upstream side where the slit 5 of the first partition 2 is provided from the outside of the pipe 1 with a finger, and the end thereof is indicated by a dotted line in FIG. , A force (pressing force) substantially in the same direction as the direction of the slit 5 is applied.

Until this force is applied, the first partition 2
At the upstream end, a slit 5 is formed from the inner peripheral wall of the pipeline 1.
9A, the slit 5 is in a closed state as shown in FIG. 9A, but the upstream end of the first partition wall 2 is closed. When a force substantially in the same direction as the direction of the slit 5 is applied to FIG.
As shown in (b), the slit 5 is opened. The degree of opening of the slit 5 can be adjusted, for example, by increasing or decreasing the force of pressing with a finger.

As a result, the third flow path 53 communicates with the flow path on the upstream side of the flow control section 9 (the flow path on the pipe 1 on the upstream side of the flow control section 9), and the inside of the pipe 1 is The flowing chemical flows into the pipe 67 from the slit 5 opened, that is, to the third flow path, and a large amount of the chemical flows to the downstream side as shown by the dotted arrow in FIG. 2 (flash). That is, by opening the slit 5, the liquid medicine can be rapidly flowed during that time.

After the chemical solution is temporarily and rapidly flowed, the finger is elastically deformed by releasing the finger from the pipe 1 (or by removing the force of the finger sandwiching the pipe 1). Because the pipe 1 and the first partition 2 that have been returned to the original shape,
As described with reference to FIG. 8 and FIG.
Due to the pressing force from the inner peripheral wall and the self-restoring force of the first partition 2, the slit 5 is closed, and the chemical liquid whose flow rate has been adjusted as described above flows through the groove 10 of the closing portion 3.

(Effects of the First Embodiment) As is clear from the above description, the flow controller 200 of the first embodiment moves the adjustment operation member 4 to the predetermined position by sliding. By doing so, each of the ribs 20, 21 provided on the adjusting operation member 4 allows the pipe 1, the first partition 2, and the closing portion 3
Is pressed to regulate the opening / closing amount of the groove 10 provided in the closing portion 3 to set the flow rate.

For this reason, only pressure enough to open and close the groove 10 is applied to the pipe 1, the first partition 2 and the closing part 3, and the pipe 1, the first partition 2 and the closing part 3, the amount of distortion of the groove 10 can be prevented from changing over time, and the administration of a drug solution or the like (infusion or blood transfusion) can be always performed at a stable flow rate.

Further, even a beginner can easily, quickly and surely adjust the flow rate, and thus can easily, quickly and surely administer a drug solution or the like.

Further, by providing the first flow path 51, the second flow path 52, and the third flow path 53, it is possible to substantially eliminate a staying portion in which a liquid, a gas or the like stays. Thereby, for example, the concentration of the drug solution or the like can be maintained at a predetermined constant concentration.

The second partition 65 (particularly the pipe 67)
Is formed of a hard member (hard material), the pipe 67 serves as a support even when excessive force is applied to the finger for picking the first partition 2 when increasing the flow rate, and the third flow path is formed. 5
It is possible to prevent inconveniences such as the closure of 3. That is, when increasing the flow rate, it is possible to prevent the third flow path 53 from being closed so that a chemical solution or the like does not flow or the third flow path 53 from being too narrow to obtain a sufficient flow rate. can do.

The flow controller 200 has a slit 5 in the first partition 2 and a groove 10 in the closing part 3.
Since it can be manufactured simply by inserting these and the second partition wall 65 into the pipeline 1, it is possible to manufacture easily at low cost.

A scale 12 and a pointer 13 are provided so that a flow rate corresponding to the scale 12 indicated by the pointer 13 can be obtained. For this reason, by using this scale 12 as a guideline for the administration of a medical solution or the like, even a beginner can easily administer the amount of the medical solution specified by a doctor or a nurse. Recently, the patient and his / her family and the like often perform a technique such as administration of a drug solution. However, the flow controller 200 can easily adjust the flow rate even for a beginner as described above. The patient and his / her family can safely perform a procedure such as administration of a drug solution, and can save time for a doctor and a nurse.

In the case where it is necessary to temporarily and rapidly flow a chemical solution or the like after the flow rate is adjusted, the upstream end of the first partition 2 from the outside of the pipeline 1 (the portion where the slit 5 is provided). ) Is sandwiched between fingers to apply an appropriate pressure to open the slit 5, so that a large amount of a drug solution or the like can flow downstream through the slit 5 and the third channel 53. That is, when necessary, a chemical solution or the like can be rapidly flowed by a simple operation.

Further, after the chemical solution or the like is temporarily and rapidly flown, the slit 5 is closed only by releasing the finger sandwiching the upstream end of the first partition wall 2. The flow rate can be instantaneously, easily and reliably returned to the original flow rate.
For this reason, after a chemical solution etc.
The trouble of readjusting the flow rate to the original flow rate can be omitted.

Further, the closing portion 3 for performing the operation at the time of normal flow rate adjustment and the upstream end (valve portion) of the first partition 2 for performing the operation for increasing the flow rate are separated from each other. Therefore, by opening and closing the slit 5 of the first partition 2, it is possible to prevent the inconvenience that the flow rate adjusted by the closing portion 3 changes. In addition, it is possible to prevent a disadvantage that the slit 5 is erroneously opened when the flow rate is adjusted by the adjusting operation member 4.

Also, as described with reference to FIG. 8, the slit 5 can be normally closed in the normal state, thereby preventing the inconvenience that the chemical solution or the like flows downstream through the slit 5. Can be. For this reason, at normal times,
A stable flow rate as adjusted by operating the adjusting operation member 4 can be obtained.

The upstream end of the first partition 2 may be provided with an outer diameter smaller than the inner diameter of the conduit 1 so that the entire periphery thereof does not contact the inner peripheral wall of the conduit 1. Alternatively, the outer diameter may be set to be substantially the same as the inner diameter of the pipe 1 so that the entire circumference thereof is in contact with the inner peripheral wall of the pipe 1.

In the description of the first embodiment,
The groove 10 is provided in the closing portion 3. However, as shown in FIG. 10, the groove 25 is provided on the pipe 1 side, that is, on the inner wall of the pipe 1 and near the closing portion 3. You may. Also in this case, the opening / closing amount of the groove 25 can be adjusted (variably controlled) by sliding the adjusting operation member 4 as described above, and the same effect as in the first embodiment can be obtained. it can.

It is preferable that the conduit 1 having the groove 25 has appropriate hardness for forming (holding) the flow path stably and appropriate flexibility for elastic deformation. As a constituent material of the conduit 1, for example, polypropylene, polyethylene, vinyl chloride resin, fluororesin,
Acrylonitrile-butadiene-styrene copolymer (A
BS resin) and the like. In addition, pipeline 1
Preferably have high yield point elongation, high tear strength and excellent creep resistance. In addition, the conduit 1 is preferably transparent (having light transmittance) so that air bubbles and the like in the flow path can be visually recognized (confirmed) from the outside.

Further, the closing portion 3 having no groove is provided.
Is preferably relatively soft and elastically deformable.
Examples of the constituent material of the closing portion 3 include various rubbers such as silicone rubber, natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, butyl rubber, and fluoro rubber, polypropylene, polyethylene, vinyl chloride resin, fluoro resin, and acrylonitrile. -Various resins such as butadiene-styrene copolymer (ABS resin). Further, it is preferable that the closing portion 3 is transparent (has a light transmitting property) so that bubbles and the like in the flow path can be visually recognized (confirmed) from the outside.

In the description of the first embodiment,
Although one slit 5 is provided at the upstream end of the first partition 2, this is shown in FIG.
As shown in (b), two slits 26 may be provided, or three or more slits 26 may be provided. That is, a plurality of slits 26 may be provided. FIG. 11A is a side view of the upstream end of the first partition 2, and FIG. 11B is a plan view of the upstream end of the first partition 2. Thereby, when the upstream end of the first partition 2 is pinched by a finger through the conduit 1, a larger flow rate can be obtained through the plurality of slits.

In the description of the first embodiment,
Although one groove 10 is provided, a plurality of grooves may be provided. However, if a plurality of grooves are provided, the flow path is not limited, so that air bubbles (air) block a part of the flow path, and the air block may easily change the flow rate (flow rate). For this reason, it is preferable to provide one groove 10 as in the first embodiment because it is possible to make it difficult for the air block to change the flow velocity.

The pattern of the groove 10 and the groove 25 is as follows.
It is not limited to the linear shape shown, for example, a folded line shape, a curved shape,
A wave shape (sinusoidal shape) and the like can be mentioned.

Further, for example, the width of the groove 10 or the groove 25 may be increased so that the groove 10 or the groove 25 is not completely closed.

Further, for example, by partially expanding the width of the groove 10 or the groove 25, a part of the groove 10 or the groove 25 may not be completely closed.

It is preferable that at least a part of the groove 10 or the groove 25 is configured to be completely closed.

The sectional shapes of the groove 10 and the groove 25 are as follows.
Although the shape is substantially V-shaped, the shape is not limited to this, and may be other shapes such as, for example, substantially U-shape or U-shape.

As described above, by changing the shapes of the groove portions 10 and the groove portions 25 and the dimensions of the adjusting operation member 4, the distortion of the pipeline 1, the first partition 2 and the closing portion 3 during the flow rate adjustment can be reduced. And various flow control areas (flow control range)
Can be set freely, and a setting that does not require a delicate adjustment operation can be made. In addition, the groove 10
Since the flow rate adjustment range can be changed simply by changing the length and depth of the groove 25, it is also possible to immediately respond to various flow rate requirements.

The relationship between the amount of opening and closing of the grooves 10 and 25 and the amount of operation of the adjusting operation member 4 when adjusting the flow rate may be linear (linear) or non-linear (non-linear). You may. For example, the relationship between the opening / closing amounts of the grooves 10 and 25 and the amount of operation of the adjusting operation member 4 at the time of adjusting the flow rate is a non-linear relationship. On the high flow rate side, the flow rate may be finely adjusted. On the contrary, on the high flow rate side, the flow rate can only be changed largely (coarsely), but on the low flow rate side, the flow rate can be finely adjusted. Can be set.

When the adjusting operation member 4 is slid to apply a load to the conduit 1, the first partition 2 and the closing portion 3 to deform them, the vicinity of the groove 10 of the closing portion 3 It tends to bend at an acute angle compared to a portion where the groove 10 is not provided. For this reason, it is preferable to form the closing part 3 with a constituent material such that the vicinity of the groove 10 of the closing part 3 does not bend at an acute angle. Further, it is preferable that the thickness of the vicinity of the groove 10 of the closing portion 3 is made thick and the thickness of the facing side is thin. Thereby, when the adjustment operation member 4 is slid to apply a load to the pipeline 1, the first partition 2 and the closing portion 3 to deform them, the outer peripheral wall of the closing portion 3 and the inside of the pipeline 1 are deformed. Formation of a gap other than the groove 10 between the peripheral wall and the peripheral wall can be more reliably prevented.

Further, a rotation preventing means (for example, a guide groove and a guide rib) for preventing the rotation of the adjusting operation member 4 with respect to the pipeline 1 may be provided. In this case, for example, pipe 1
A pair of guide grooves is provided along the axis of the pipe line 1 on the outer wall of the adjusting operation member 4.
A pair of guide ribs which are slidably fitted in the respective guide grooves are provided along the axis. Conversely, the guide rib is provided on the pipe 1 side, and the guide groove is provided on the adjustment operation member 4 side.

Thus, even if a force in the rotating direction is applied when the adjusting operation member 4 is slid, the rotation of the adjusting operation member 4 with respect to the pipe line 1 is prevented, and the groove 10 and the ribs 20 and 21 are properly adjusted. The adjusting operation member 4 can be slid while maintaining a proper positional relationship, whereby the flow rate can be adjusted more accurately and reliably.

[Second Embodiment] Next, a flow controller according to a second embodiment of the present invention will be described. The flow controller 200 according to the first embodiment described above includes one or more slits 5 at the apex of the upstream end of the first partition 2.
However, the flow controller 200 according to the second embodiment is provided with a plurality of flow controllers at the upstream end of the first partition wall 2 and on the side surface slightly downstream from the apex. A hole is provided. It should be noted that the second embodiment is different from the first embodiment only in this point. Therefore, only the difference will be described below, and redundant description will be omitted.

(Configuration of Second Embodiment) FIG. 12 (a)
FIG. 12 is a side view of the distal end portion of the first partition wall 2 provided in the flow controller according to the second embodiment.
(B) and (c) are sectional views (transverse sectional views) taken along line AB in FIG. 12 (a).

As can be seen from FIGS. 12 (a) and 12 (b), the flow rate controller 200 according to the second embodiment has a side wall slightly downstream from the apex of the first partition wall 2. A pair of holes 31 and 32 facing each other are provided.

The upstream end of the first partition 2 is shown in FIG.
As shown in (b), when viewed from the axial direction, it has a substantially elliptical shape, and in the normal state, the vicinity of each of the holes 31 and 32 on the outer peripheral wall of the first partition 2 is inside the pipe 1. The holes 31 and 32 are pressed against the peripheral wall, and are closed by the inner peripheral wall of the pipeline 1.

(Operation of the Second Embodiment) In the flow controller 200 having the first partition 2 according to the second embodiment, when the flow rate is increased (flushed),
The finger is picked up slightly below the apex of the first partition wall 2 through the pipe 1 by a finger, and as shown by the dotted line in FIG.
A force is applied in a direction perpendicular to a straight line connecting the first and second lines.

As a result, a gap is formed between the vicinity of each of the holes 31 and 32 on the outer peripheral wall of the first partition wall 2 and the inner peripheral wall of the pipeline 1, which have been in contact therewith. A chemical solution or the like flows into the third flow path 53 via 32, and a large amount of the chemical solution or the like flows downstream.

After a large amount of the drug solution or the like is temporarily flowed to the downstream side, the finger holding the first partition 2 through the pipe 1 is released, so that the pipe 1 and the first partition are separated. 2 returns to a state in which the vicinity of each of the holes 31 and 32 on the outer peripheral wall of the first partition wall 2 shown in FIG.
As a result, the flow rates of the liquid medicine and the like return to the original flow rates adjusted by the adjustment operation member 4.

(Effects of the Second Embodiment) As is clear from the above description, the flow controller 200 of the second embodiment is provided at the upstream end of the first partition 2. Through the holes 31 and 32, a large amount of a chemical solution or the like is caused to flow downstream. That is, the flow rate can be increased, and the flow rate controller 20 of the first embodiment described above can be used.
The same effect as 0 can be obtained. The number of the holes may be one, but a plurality is preferable.

[Third Embodiment] Next, a third embodiment of the flow controller according to the present invention will be described. In the flow controller 200 of the first embodiment, the first partition 2
The slit 5 is provided at the apex of the upstream end of the flow controller. However, in the flow controller 200 of the third embodiment,
Of the upstream end of the first partition 2, not the apex,
A slit is provided in the side wall part slightly downstream from the apex. Since the third embodiment is different from the first embodiment only in this point, only the difference will be described below, and redundant description will be omitted.

(Configuration of Third Embodiment) FIG. 13 (a)
FIG. 9 is a plan view of a first partition wall 2 provided in the flow controller according to the third embodiment.

As can be seen from FIG. 13 (a), a slit 45 is provided in the side wall slightly downstream from the apex of the first partition 2 of the flow controller 200 according to the fourth embodiment. ing.

When viewed from the axial direction, the slit 45 is formed (arranged) so as not to pass through the dome-shaped apex of the first partition 2 (the center when viewed from the axial direction).

(Operation of Third Embodiment) FIG. 13B
Is a direction indicated by a dotted arrow in FIG. 13A with respect to the first partition wall 2 in which the slit 45 is provided.
FIG. 9 is a plan view showing a state in which a force is applied from a direction substantially orthogonal to a forming direction of a slit 45.

When this force is applied, as shown in FIG. 13 (b), the upstream portion (upper tongue) 45a of FIG. 13) An opening 46 is formed at the end in the horizontal direction in FIG. That is, the slit 45 is opened. For this reason, when increasing the flow rate, a chemical solution or the like can flow from the opening 46 to the downstream side via the third flow path 52.

FIG. 13 (c) shows the direction of formation of the slit 45 with respect to the first partition wall 2 provided with the slit 45, which is the direction indicated by the solid arrow in FIG. 13 (a). It is a side view which shows the state which applied force from the direction.

When this force is applied, as shown in FIG. 13 (c), the upper tongue 45a of the slit 45 bends (deforms) so that the upstream side is convex, and the lower tongue 45b is convex on the downstream side. Thus, the opening 46 is formed. That is, the slit 45 is opened. For this reason, when increasing the flow rate, a chemical solution or the like can flow from the opening 46 to the downstream side via the third flow path 53.

(Effect of Third Embodiment) As described above,
In the flow controller 200 according to the third embodiment, since the first partition 2 is provided with the slit 45 that does not pass through the apex, the slit 45 is easily opened when increasing the flow rate. The same effect as in the first embodiment can be obtained.

[Fourth Embodiment] Next, a fourth embodiment of the flow controller according to the present invention will be described. In the flow controller 200 according to the first embodiment, one slit 5 is provided at the apex of the upstream end of the first partition 2. In the flow controller 200, a plurality of slits are provided not on the apex but on the side wall slightly downstream from the apex in the upstream end of the first partition 2. It should be noted that the fourth embodiment and the above-described first embodiment differ only in this point, and hence only the difference will be described below, and redundant description will be omitted.

(Structure of the Fourth Embodiment) FIG. 14 shows a first embodiment provided in the flow rate controller of the fourth embodiment.
3 is a perspective view of an operation portion (a portion picked by a finger) of the partition wall 2 of FIG.

As can be seen from FIG. 14, the flow controller 200 according to the fourth embodiment has a side wall slightly downstream from the top of the first partition 2 in the circumferential direction of the first partition 2. 3 slits 48 at substantially equal intervals (substantially equal angular intervals) along
Is provided.

When viewed from the axial direction, each slit 48
The first partition 2 is formed (arranged) so as not to pass through the dome-shaped vertex (the center when viewed from the axial direction).

(Operation of Fourth Embodiment) In the flow controller 200 according to the fourth embodiment, when the first partition 2 is picked up through the pipe 1, the flow is added. Any one or more slits 48 depending on the direction of force
Is opened. Note that all the slits 48 may be in an open state depending on how to grip the first partition 2 and the direction of the force applied to the first partition 2.

(Effect of Fourth Embodiment) As described above,
In the flow controller 200 according to the fourth embodiment, since the first partition 2 is provided with the slit 48 that does not pass through the apex, the slit 48 is easily opened when increasing the flow rate, and Since the three slits 48 are provided, when the first partition 2 is pinched, any one of the slits 48 is always used regardless of the direction of the force applied to the first partition 2.
One or more slits 48 are opened. This makes it possible to reliably flow a large amount of a chemical solution or the like to the downstream side, and to obtain the same effect as that of the above-described first embodiment.

Note that in the fourth embodiment,
Although three slits 48 are provided in the first partition 2, two or four or more slits 48 may be provided. That is, it is sufficient that a plurality of slits 48 are provided.

[Fifth Embodiment] Next, a fifth embodiment of the flow controller according to the present invention will be described. In the flow controller 200 according to the first embodiment described above, the first flow path 51 is closed by the closing portion (closing means) 3. However, the flow controller 200 according to the fifth embodiment is used. Is such that the second flow path 52 is closed by a closing portion (closing means) 3.

Note that the above-described first embodiment and the fifth embodiment
Since only this point differs from the first embodiment,
Only the difference will be described, and redundant description will be omitted.

(Structure of Fifth Embodiment) FIG. 15 is a longitudinal sectional view of a flow controller according to a fifth embodiment.

As can be seen from FIG. 15, in the flow controller 200 according to the fifth embodiment, the closing portion (closing means) 3
Is provided on the outer periphery of the second partition 65 on the downstream side of the pipe 67. The closing section 3 closes the second flow path 52.

(Operation of the Fifth Embodiment) As in the first embodiment, when the adjusting operation member 4 is slid, the open / close state of the groove 10, that is, the opening / closing amount of the groove 10 (cross-sectional area) ) Changes.

The chemical liquid flowing from the upstream side in the pipe line 1
First, it flows from the upper side to the lower side in FIG. 15 along the first flow path 51, flows into the second flow path 52, then passes through the groove 10, and flows along the second flow path 52. And the opposite direction,
That is, it flows upward from the lower side in FIG. 15 and flows into the third channel 53. Next, the chemical solution is supplied to the third flow path 5.
3, flows from the upper side to the lower side in FIG. 15, and further flows in the pipeline 1 to the downstream side.
Then, the medicinal solution is administered to the patient via the injection needle.

(Effects of Fifth Embodiment) The flow controller 200 of the fifth embodiment can obtain the same effects as those of the above-described first embodiment.

In the description of the fifth embodiment,
Although the groove portion 10 is provided in the closing portion 3, the groove portion 10 may be provided on the first partition 2 side, that is, on the inner wall portion of the first partition 2 and near the closing portion 3. . Even in this case, the opening / closing amount of the groove 10 can be adjusted (variably controlled) by sliding the adjusting operation member 4, and the same effect as that of the fifth embodiment can be obtained.

[Sixth Embodiment] Next, a sixth embodiment of the flow controller according to the present invention will be described. The flow controller 200 of each of the above-described embodiments adjusts the opening / closing amount of the groove 10 by sliding the adjusting operation member 4 to adjust the flow rate of the chemical solution or the like. In the flow controller 200 of this embodiment, the opening / closing amount of the groove 10 is adjusted by a rotary operation-type adjusting operation member so as to adjust the flow rate of a chemical solution or the like.

It should be noted that each of the above-described embodiments is different from the sixth embodiment only in this point, and hence only the difference will be described below, and redundant description will be omitted.

(Structure of Sixth Embodiment) FIG. 16 is a perspective view of a flow controller according to an eleventh embodiment, and FIG. 17 is a longitudinal sectional view of a flow controller according to a sixth embodiment. is there.

As shown in FIG. 16, this flow controller 20
The outer appearance of the rotary operation type adjusting operation member (opening / closing amount adjusting means) 80 at 0 has a cylindrical shape, and the conduit 1 is wound from above the closing portion 3 as shown in FIG. Is provided. In other words, the adjustment operation member 80
An insertion hole (through-hole) 81 is provided at substantially the center of the pipe 1. By inserting the pipe 1 into the insertion hole 81, the adjusting operation member 80 is moved along the pipe 1 in the circumferential direction. It is installed so that it can rotate (rotate) in both forward and reverse directions.

The shape of the insertion hole 81 into which the pipe 1 is inserted in the cross section (the inner shape in the cross section of the adjusting operation member 80) is shown in FIG. 16 (and see FIGS. 18A and 18B below). It has an elliptical shape as shown in FIG.

Since the insertion hole 81 has an elliptical shape, it has a major axis and a minor axis. At least the minor axis is smaller than the outer diameter of the pipeline 1. For this reason, the pipe 1, the first partition 2, and the closing part 3 of the portion inserted into the insertion hole 81 are each crushed so that the outer shape in the cross section becomes elliptical along the insertion hole 81. State.

A pointer 83 is provided on the downstream end surface portion 82 of the adjusting operation member 80, and is provided on the pipe 1 side (for example, the pipe 1, the first partition 2, the closing section 3, etc.). A scale 84 indicating the flow rate of a chemical solution or the like is provided in correspondence with the pointer 83. The scale 84 is provided based on the opening / closing amount of the groove 10 of the closing portion 3 corresponding to the rotational position of the adjusting operation member 80. The operator adjusts the pointer 83 to the desired scale 84 to thereby adjust the groove 10 A desired flow rate is obtained by adjusting the opening / closing amount of.

As shown in FIG. 17, a guide rib 85 is provided along the circumferential direction on the inner peripheral portion of the upstream end of the adjusting operation member 80, and the guide rib 85 is provided on the outer peripheral portion of the pipeline 1. Guide grooves 86 are provided along the circumferential direction corresponding to the guide ribs 85. Guide rib 85 of adjustment operation member 80
Are rotatably fitted along a guide groove 86 provided on the pipeline 1 side. The adjustment operation member 80 is rotatably held at a fixed position in the axial direction on the pipeline 1 by the guide rib 85 and the guide groove 86, and the adjustment operation member 80 is moved relative to the pipeline 1 by a rotation operation by an operator. It is designed not to slide in the axial direction to cause a positional shift.

The guide groove 86 and the guide rib 85 constitute a slide preventing means.

As shown in FIG. 17, a slit 5 is provided at the upstream end of the first partition wall 2 provided in the pipeline 1, and this slit 5 is formed. The portion (valve portion) is located upstream of the adjustment operation member 80.

(Operation of Sixth Embodiment) FIG.
(A), (b) is a cross-sectional view of the flow rate controller of the sixth embodiment, and (a) of FIG. 18 shows the rotational position of the adjusting operation member 80 in which the groove 10 is in the fully closed state. , FIG. 18 (b)
Indicates the rotational position of the adjusting operation member 80 in which the groove 10 is in the fully opened state. Note that the dotted lines in FIGS. 18A and 18B indicate the positions of the hands 83 provided on the adjustment operation member 80.

First, the downstream end face 8 of the adjusting operation member 80
When the adjustment operation member 80 is rotated so that the pointer 83 provided on the line 2 is aligned with the scale 84 provided on the side of the pipe line 1 indicating zero flow rate, an elliptical shape as shown in FIG. Insertion hole 81 of adjusting operation member 80
And the groove 10 coincide with each other. As described above, the length of the short diameter is shorter than the length of the outer diameter of the pipeline 1. For this reason, the pressing force is applied to the closing portion 3 via the conduit 1 by the inner peripheral wall of the shorter diameter portion of the adjusting operation member 80, and the groove portion 10 provided in the closing portion 3 is formed as shown in FIG.
It becomes a fully closed state as shown in FIG. Therefore, the flow of the chemical solution or the like is stopped by the groove 10 in the fully closed state.

Next, when the adjusting operation member 80 is rotated clockwise (or counterclockwise) in FIG. 18 from this state, the position at which the pressing force from the inner peripheral wall of the short diameter portion of the adjusting operating member 80 is applied. The groove 10 moves in the circumferential direction from the position of the groove 10, whereby the opening / closing amount of the groove 10 gradually increases. Then, when the adjustment operation member 80 is rotated by 90 °, that is, at the rotation position where the long diameter of the insertion hole 81 of the adjustment operation member 80 matches the groove portion 10, the groove portion 10 is fully opened as shown in FIG. State.

The operator rotates the adjusting operation member 80 relative to the pipe line 1 in this manner, so that the groove 10 is rotated.
Is adjusted between the fully closed state and the fully opened state, and the flow rate of a chemical solution or the like flowing downstream is adjusted.

As described above, the upstream end (valve portion) of the first partition wall 2 protrudes upstream from the adjustment operation member 80, and when increasing the flow rate, the above-described operation is performed. As described above, the upstream end of the first partition wall 2 is pinched by a finger through the conduit 1 to open the slit 5. As a result, a large amount of a chemical solution or the like flows downstream through the slit 5 and the third flow path 53 that have been opened.

(Effect of Sixth Embodiment) As described above, the flow controller 200 of the sixth embodiment is provided with the adjusting operation member 80 having the elliptical insertion hole 81. Is rotated to control the opening / closing amount of the groove portion 10 by changing the pressing force applied to the closing portion 3 so as to adjust the flow rate of the chemical solution or the like flowing to the downstream side. Accordingly, the same effects as those of the above-described embodiments can be obtained, such that anyone can surely adjust the flow rate with a simple rotation operation.

As shown by a dotted line in FIG. 17, a positioning rib 88 may be provided to abut on the downstream end face of the first partition 2. It is preferable that the rib 88 be provided so as not to close a flow path of a chemical solution or the like flowing through the groove 10. By providing the ribs 88, the installation positions of the first partition 2 and the closing portion 3 can be positioned with respect to the pipeline 1, and the assembly of the flow controller 200 can be facilitated.

The outer shape of the adjusting operation member 80 in the cross section is a circle, but may be another shape such as an ellipse or a polygon.

The shape of the insertion hole 81 of the adjusting operation member 80 in the cross section is elliptical, but is not limited to this.

The adjusting operation member 80 is configured to apply pressure to the pipeline 1 and the first partition 2 at two points when viewed in a transverse cross section. It is preferable that pressure is applied to one partition 2.

The adjusting operation member 80 may be in contact with the pipe 1 over the entire circumference.

For example, a plurality of ribs as described with reference to FIGS. 7A and 7B are provided on the inner peripheral surface of the adjusting operation member 80, and the opening and closing amount of the groove 10 is adjusted by the ribs. It may be. It is preferable that the number of ribs provided on the adjustment operation member 80 be three or more in order to fix the rotation axis of the adjustment operation member 80 with respect to the pipeline 1, the first partition 2, and the closing portion 3.

In the description of the sixth embodiment,
The guide groove 86 is provided on the pipe 1 side, and the guide rib 85 is provided on the adjustment operation member 80 side. Conversely, the guide groove is provided on the adjustment operation member 80 side, and the guide rib is provided on the pipe 1 side. You may.

The flow controller according to the present invention has been described based on the embodiments shown in the drawings. However, the present invention is not limited to these embodiments, and the components of the flow controller exhibit the same functions. It can be replaced with any possible one.

In the present invention, the above-described predetermined configurations of the embodiments may be appropriately combined.

The use of the flow controller of the present invention is not limited to the above-described infusion / transfusion set for performing infusion and / or blood transfusion.

[0164]

As described above, according to the flow rate regulator of the present invention, it is possible to prevent the retention of liquids such as chemicals and blood. Thereby, for example, the concentration of the drug solution or the like can be maintained at a predetermined constant concentration.

In addition, the flow rate of a liquid such as a drug solution or blood can be easily, quickly and reliably adjusted even by a non-expert.

Further, a change in the flow rate with time is small or the change in the flow rate can be prevented.

[Brief description of the drawings]

FIG. 1 is a side view (partially longitudinal sectional view) showing a flow rate controller according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a state where an adjustment operation member of the flow rate controller according to the first embodiment is removed.

FIG. 3 is a perspective view of a first partition and a closing portion of the flow controller according to the first embodiment.

FIG. 4 is a cross-sectional view of the flow controller according to the first embodiment.

FIG. 5 is a side view of the flow controller according to the first embodiment.

FIG. 6 is a vertical sectional perspective view of the adjustment operation member.

FIG. 7 is a cross-sectional view of the flow controller of the first embodiment with an adjustment operation member mounted.

FIG. 8 is a cross-sectional view (a plan view of a slit portion of the first partition) of the flow controller according to the first embodiment.

FIG. 9 is a diagram for explaining an open / closed state of the slit.

FIG. 10 is a cross-sectional view showing a modified example of the flow controller of the first embodiment.

FIG. 11 is a side view and a plan view showing a modification of the slit provided in the first partition of the flow controller according to the first embodiment.

FIG. 12 is a plan view and a cross-sectional view showing a slit portion provided in a first partition of a flow rate controller according to a second embodiment of the present invention.

FIGS. 13A and 13B are a plan view and a side view showing a slit portion provided in a first partition of a flow rate controller according to a third embodiment of the present invention.

FIG. 14 is a perspective view of a slit portion provided in a first partition of a flow controller according to a fourth embodiment of the present invention.

FIG. 15 is a longitudinal sectional view of a flow controller according to a fifth embodiment of the present invention.

FIG. 16 is a perspective view of a flow controller according to a sixth embodiment of the present invention.

FIG. 17 is a longitudinal sectional view of a flow controller according to the sixth embodiment.

FIG. 18 is a cross-sectional view of a flow controller according to the sixth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipeline 2 1st partition 3 Close part 4 Adjustment operation member 5 Slit 6 1st undulation part 7 2nd undulation part 9 Flow control part 10 Groove part 12 Scale 13 Pointer 14 Winding part 15 Operation part 20 Rib 21 Rib 25 Groove 26 Slit 31 Hole 32 Hole 45 Slit 45a Upper tongue 45b Lower tongue 46 Opening 48 Slit 51 First flow path 52 Second flow path 53 Third flow path 65 Second partition 66 Stop Flow part 67 Pipe 80 Adjustment operation member 81 Insertion hole 82 Downstream end face part 83 Pointer 84 Scale 85 Guide rib 86 Guide groove 88 Rib 200 Flow rate controller

Claims (6)

[Claims] 1. A flow controller comprising: a deformable pipe having a liquid flow path therein; and a flow control section provided in the middle of the pipe to control a flow rate of the liquid. The first part formed by the partition provided in the adjustment part
Flow path, a second flow path and a third flow path, closing means for closing the first flow path or the second flow path, and a liquid for stopping the liquid stopped by the closing means. A groove having a variable area in a transverse cross section, wherein the liquid flows in the order of the first flow path, the second flow path, and the third flow path, and in the second flow path, A flow regulator, wherein the liquid is configured to flow toward an upstream side of the first flow path. 2. A flow controller comprising: a deformable pipe having a liquid flow path therein; and a flow controller provided in the middle of the pipe to adjust a flow rate of the liquid. The first part formed by the partition provided in the adjustment part
Flow path, a second flow path and a third flow path, closing means for closing the first flow path or the second flow path, and a liquid for stopping the liquid stopped by the closing means. A groove having a variable area in a transverse cross section, wherein the liquid flows in the order of the first flow path, the second flow path, and the third flow path, and in the third flow path, A flow controller, wherein the liquid is configured to flow toward an upstream side of the second flow path. 3. The first flow path, the second flow path,
The third flow path is arranged concentrically and in the order of a third flow path, a second flow path, and a first flow path from the center to the outer peripheral side. 3. The flow controller according to 2. 4. A valve portion that allows communication between the third flow passage and a flow passage on the upstream side of the flow control portion is provided near a boundary between the second flow passage and the third flow passage. The flow controller according to any one of claims 1 to 3, which is provided. 5. A dome-shaped partition wall near the boundary between the second flow path and the third flow path, wherein the partition wall is provided with the third flow path.
The flow controller according to any one of claims 1 to 3, further comprising a valve unit that allows communication between the flow path and the flow path on the upstream side of the flow control unit. 6. The flow controller according to claim 4, wherein the valve section is configured to be opened by applying pressure to the valve section from outside the pipeline.