JP2005027721A - Clamping device of flexible tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clamping device of a flexible tube capable of evading the situation that the interruption of the flow of fluid in the flexible tube becomes insufficient by a guide wall at the time of clamping, and improving the workability of clamping. <P>SOLUTION: The clamping device of the flexible tube comprises one end part 2 provided with a first projection part 6, the other end part 3 provided with a second projection part 7, an intermediate part 10 continued to one end part 2 and the other end part 3, and an engaging part 3a for engaging one end part 2. The flexible tube C is clamped by engaging one end part 2 with the engaging part 3a while deflecting the intermediate part 10 in a state where the flexible tube C is inserted between the first projection part 6 and the second projection part 7, and the flow of the fluid at the part is interrupted. The guide wall 8 for guiding one end part 2 to the engaging part 3a is erected from the edge part of the first projection part 6 or the second projection part 7, and a projection part 9 for separating the flexible tube C from the guide wall 8 is positioned. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a clamp device for a flexible tube for clamping a flexible tube constituting an extracorporeal circuit such as a blood circuit, an auxiliary circuit, an infusion circuit, or the like, and blocking the flow of fluid at the site. Is.
[0002]
[Prior art]
In general, a blood circuit in a dialysis machine or the like is mainly composed of a flexible tube that allows a patient's blood, physiological saline, or medicine to be administered in a medical field to flow, and connects each component such as a dialyzer and a drip chamber. To do. Conventionally, as shown in FIGS. 11 to 13, a clamping device for blocking a desired portion of the flexible tube has one end portion 102 and the other end portion 103 in which an insertion hole 105 and an engaging portion 103 a are formed. The intermediate portion 110 in which the insertion hole 104 is formed is mainly configured.
[0003]
Further, a first convex portion 106 and a second convex portion 107 facing each other are formed at one end portion 102 and the other end portion 103 of the clamping device 101, and the intermediate portion 110 is bent so that the one end portion 102 is the other. When engaged with the engaging portion 103a of the end portion 103, the first convex portion 106 and the second convex portion 107 come close to each other, and the flexible tube C inserted through the insertion holes 104 and 105 is clamped. (For example, Patent Document 1 and Patent Document 2 disclose a clamp device having such a structure).
[0004]
However, when the present applicant bends the intermediate portion 110 and engages the one end portion 102 with the engaging portion 103 a of the other end portion 103, the end portion 102 is displaced in the width direction of the engaging portion 103. In order to avoid being engaged, the present inventors have proposed a guide wall 108 as shown in FIG. The guide wall 108 is for guiding the first convex portion 106 formed on the one end portion 102 in the process in which the one end portion 102 moves to the engaging portion 103a during clamping, and is shown in FIGS. As described above, the other end portion 103 is erected upward from both edges of the second convex portion in FIG.
[0005]
[Patent Document 1]
Japanese Utility Model Publication No. 6-86743 [Patent Document 2]
JP-A-2001-353215 [0006]
[Problems to be solved by the invention]
However, the conventional flexible tube clamping device has the following problems. That is, when the flexible tube C inserted through the insertion holes 104 and 105 is clamped by the first convex portion 106 and the second convex portion 107, the outer diameter dimension t is as shown in FIG. As shown in FIG. 5B, the width becomes a dimension T in the width direction, and the dimension in the width direction increases.
[0007]
Accordingly, as shown in FIG. 13, when the flexible tube C is in a position very close to or in contact with the inner surface 108 a of the guide wall 108, the first convex portion 106 and the second convex portion 107 are clamped. At this time, since the dimension of the flexible tube C in the increasing width direction cannot be allowed and the flow of the fluid in the flexible tube C may not be sufficiently blocked, the flexible tube C is not provided in the guide wall 108. It was necessary to work carefully so as not to be close to the position. Even in such a state, depending on the material and size of the flexible tube C, it is possible to force the clamping, but the end portion 102 is engaged with the engaging portion 103a with a force larger than usual. There is also a problem that workability deteriorates.
[0008]
In particular, in medical sites and the like, there are many cases in which an urgent work is required, and performing a careful and accurate operation in the operation of the clamp device has been a big problem for medical sites that perform urgent work.
[0009]
The present invention has been made in view of such circumstances, and can prevent the fluid flow in the flexible tube from being insufficiently blocked by the guide wall at the time of clamping, and can improve the workability of the clamp. It is an object of the present invention to provide a flexible tube clamping device that can be improved.
[0010]
[Means for Solving the Problems]
The invention according to claim 1 is connected to the one end portion on which the first convex portion is formed, the other end portion on which the second convex portion facing the first convex portion is formed, and the one end portion and the other end portion. An intermediate portion and an engaging portion that is formed at the other end portion and engages the one end portion, and a flexible tube is inserted between the first convex portion and the second convex portion. When the one end portion is engaged with the engaging portion while the intermediate portion is bent, the first convex portion and the second convex portion are close to each other to clamp the flexible tube, and the flow of fluid in the portion And a guide wall for guiding the one end portion to the engaging portion from the edge of the first convex portion or the second convex portion. A separating means for separating the flexible tube inserted between the first convex portion and the second convex portion from the guide wall is provided. And it features.
[0011]
According to a second aspect of the present invention, in the flexible tube clamping device according to the first aspect, the spacing means protrudes inward to position the inserted flexible tube at a position spaced from the guide wall. It consists of a protrusion part.
[0012]
According to a third aspect of the present invention, in the flexible tube clamping device according to the second aspect, the protruding portion is located at a position deviated from the movement locus of the first convex portion or the second convex portion on the inner surface of the guide wall. It is provided.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The flexible tube clamping device according to the first embodiment includes, for example, a blood circuit used for flowing a patient's blood during an artificial dialysis treatment, and a drug extended from various components connected to the blood circuit. Or clamps a flexible tube that constitutes a flow path for flowing physiological saline, etc., and blocks the flow of fluid inside the tube. For example, it is configured as shown in FIGS. ing.
[0014]
The clamping device 1 includes a first end portion 2 on which a first convex portion 6 is formed, a second end portion 3 on which a second convex portion 7 is formed, and an intermediate portion 10 connected to the one end portion 2 and the other end portion 3. These parts are formed by integrally molding a predetermined resin (for example, polypropylene, olefin resin, polyethylene, or the like). In addition, the state before clamping a flexible tube is shown by FIGS. 1-3, and the clamped state is shown by FIG.
[0015]
The one end portion 2 has a convex first convex portion 6 formed to extend downward from the inner surface (the lower surface in FIG. 1), and an operator is placed on the outer surface (the upper surface in the same figure). Concave and convex shapes are formed so that fingers do not slip during the clamping operation. Further, the tip of the one end portion 2 is formed at an acute angle when viewed from the thickness direction (the direction of FIG. 1), and is configured to be smoothly engaged with an engaging portion 3a described later.
[0016]
The intermediate portion 10 is a portion located between the one end portion 2 and the other end portion 3, and one insertion hole 4 through which the flexible tube C is inserted is formed. The operator bends the intermediate portion 10 to move the tip of the one end 2 in a direction approaching the tip of the other end 3, and the one end 2 is engaged with the engaging portion 3a. 4 (ie, a clamped state).
[0017]
As shown in FIG. 1, the other end portion 3 is configured to extend from a portion extending substantially in the horizontal direction, and a second convex portion 7 is formed in the portion extending in the horizontal direction. The second convex portion 7 is formed at a position facing the first convex portion 6 described above. In the state before clamping, the first convex portion 6 and the second convex portion 7 are flexible. The spacing dimension is such that the tube C can pass through.
[0018]
Moreover, the other insertion hole 5 for inserting the flexible tube C is formed in the standing part in the other end part 3, and from the other insertion hole 5 to the one insertion hole 4 described above. The flexible tube is inserted, and the flexible tube can be positioned between the first convex portion 6 and the second convex portion 7.
[0019]
Furthermore, an engaging portion 3 a is formed at the tip of the upright portion of the other end portion 3. Specifically, the inner side surface at the tip of the other end portion 3 has a shape that is gently undulated so that the tip of the one end portion 2 can slide, forms a step at a predetermined position, and the step is the engagement portion 3a. Is made. That is, when the one end portion 2 is engaged with the engaging portion 3a, the one end portion 2 is prevented from returning to the original state by the restoring force of the intermediate portion 10 or the like, and the state of FIG. 4 can be maintained. It can be done.
[0020]
In a state where the tip of the one end 2 is engaged with the engaging portion 3a (clamped state in FIG. 4), the first convex portion 6 and the second convex portion 7 are sandwiched from above and below the flexible tube C, By making the cross-sectional shape of the flexible tube C as shown in FIG. 14B, it is possible to block the flow of the fluid inside. That is, a part of the flexible tube C inserted into the one insertion hole 4 and the other insertion hole 5 is crushed by the first protrusion 6 and the second protrusion 7, and the fluid flow path is blocked. It is.
[0021]
Incidentally, a pair of guide walls 8 are erected from both edge portions of the second convex portion 7, which are portions extending in the substantially horizontal direction of the other end portion 3 in FIG. 1. As shown in FIG. 2, the pair of guide walls 8 are formed such that the dimension between the inner surfaces 8a is slightly larger than the width of the first convex portion 6, and the one end portion 2 is moved to engage with the engaging portion 3a. It serves as a guide for the occasion.
[0022]
That is, since the first convex portion 6 moves along the inner surfaces 8a of the pair of guide walls 8, the lateral displacement of the one end portion 2 in the figure can be avoided, and the tip end of the one end portion 2 is securely engaged. It is configured to be able to guide up to the portion 3a. In the present embodiment, the guide walls 8 are formed at both edges of the second protrusion 7 at the other end 3, but the same guide is provided at both edges of the first protrusion 6 at the one end 2. A wall may be provided and guided.
[0023]
Further, the inner surface 8a of the pair of guide walls 8 is formed with a protruding portion 9 as a separating means that protrudes inward. These protruding portions 9 are formed in a convex shape at a position deviating from the movement locus of the first convex portion 6 when the one end portion 2 is moved from the normal state shown in FIG. 1 to the clamped state shown in FIG. The first protrusion 6 is sometimes configured not to interfere with the protrusion 9.
[0024]
As shown in FIG. 3, the protruding portion 9 allows the flexible tube C inserted through one insertion hole 4 and the other insertion hole 5 to be separated from the inner surface 8a of the guide wall 8 as in the prior art. Problems that occur when the flexible tube C is very close to or in contact with the guide wall 8 can be avoided. That is, since the flexible tube C can be positioned at a position separated from the guide wall 8 by the protruding portion 9, even if the width of the flexible tube C increases during clamping, the size of the increase is allowed. It can be done.
[0025]
Therefore, it is possible to prevent the fluid flow of the flexible tube C from being sufficiently blocked by the guide wall 8 at the time of clamping and to increase the width of the flexible tube generated at the time of clamping. Can be avoided from being strongly pressed against the inner surface 8a of the guide wall 8 and a large clamping force is not required, so that the workability of the clamp can be improved.
[0026]
In addition, since the protruding portion 9 (separating means) for separating the flexible tube C from the guide wall 8 is provided in the guide wall 8 itself, it is more effective than those provided in other parts, and The flexible tube C can be reliably separated from the guide wall 8. That is, the flexible tube C is often bent (in a state where it is bent in a normal state) or the like, and it is assumed that the flexible tube C is positioned at a position away from the guide wall 8. However, since it is assumed that the guide wall 8 is close to or abuts in the vicinity of the guide wall 8, such a problem can be effectively avoided by providing the guide wall 8 itself with the protruding portion 9 as a separating means.
[0027]
Next, a second embodiment of the present invention will be described.
As in the first embodiment, the flexible tube clamping device according to the present embodiment constitutes a blood circuit used during artificial dialysis treatment and a flow path extending from various components connected to the circuit. As shown in FIGS. 5 to 7, one end 2 where the first convex portion 6 is formed and the other end portion where the second convex portion 7 is formed. 3 and an intermediate portion 10 connected to the one end portion 2 and the other end portion 3. Note that components similar to those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0028]
As in the first embodiment, a guide wall 8 is formed in the clamping device 1 in the present embodiment, and a protruding portion for separating the flexible tube C from the guide wall 8 as shown in FIG. 11 and 12 are formed in one insertion hole 4 and the other insertion hole 5, respectively. Specifically, since the protruding portions 11 and 12 protrude from both side edges of the insertion holes 4 and 5, for example, as shown in FIG. The part 11 is also in a state of projecting in the direction of reducing the opening width of the insertion hole 5 from both side edges.
[0029]
Further, the protrusions 11 and 12 are integrally formed on both side edges of the insertion holes 4 and 5 in the intermediate part 10 and the other end part 3, and apparently, the one insertion hole 4 and the insertion hole 4 in the first embodiment This is substantially the same as the one in which the opening width of the other insertion hole 5 is reduced. Since the protruding portions 11 and 12 cause the flexible tube C to pass through the insertion holes 4 and 5 at a substantially central position with respect to the width direction of the clamping device 1, the flexible tube C is connected to the guide wall 8. Even if the width dimension of the flexible tube C increases at the time of clamping, it can be tolerated.
[0030]
Next, a third embodiment of the present invention will be described.
As in the first and second embodiments, the flexible tube clamping device according to the present embodiment is a flow extending from a blood circuit used during artificial dialysis treatment and various components connected to the circuit. It is for clamping the flexible tube which comprises a path | route, and as shown in FIGS. 8-10, the one end part 2 in which the 1st convex part 6 was formed, and the 2nd convex part 7 were formed. It is mainly comprised from the other end part 3 and the intermediate part 10 connected to these one end part 2 and the other end part 3. Note that the same components as those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.
[0031]
As in the first and second embodiments, a guide wall 8 is formed in the clamping device 1 in this embodiment, and the flexible tube C is separated from the guide wall 8 as shown in FIG. Protruding portions 13 and 14 are formed in the other insertion hole 5 and one insertion hole 4, respectively. Specifically, since the protruding portion 13 protrudes from one side edge surface of the insertion hole 5 and the protruding portion 14 protrudes from the other side edge surface of the insertion hole 4, for example, as shown in FIG. When viewed from the side of the portion 3, the protruding portion 13 protrudes from the side edge surface of the insertion hole 5 in the direction of reducing the opening width. Similarly, the protruding portion 14 has a shape protruding from the other side edge surface of the insertion hole 4 in the direction of reducing the opening width.
[0032]
That is, the protrusions 11 and 12 according to the second embodiment protrude from both side edges of the insertion holes 4 and 5 to position the inserted flexible tube C in the center in the width direction of the clamp device 1. On the other hand, the protruding portions 13 and 14 according to the present embodiment protrude from the opposite side edges of the insertion holes 4 and 5, respectively, and extend the inserted flexible tube C in the substantially horizontal direction of the other end portion 3. It is constituted so that it may be positioned on a substantially diagonal line (refer to Drawing 10) in the part.
[0033]
The flexible tube C positioned by the protrusions 13 and 14 is positioned at a position separated from the inner surface of the guide wall 8 as in the first and second embodiments, and the flexible tube C is clamped. Increasing the width dimension of C can be tolerated. The protrusions 13 and 14 are formed integrally with the side edges of the insertion holes 4 and 5 in the intermediate part 10 and the other end part 3 as in the second embodiment. This is substantially the same as the one in which the opening widths of the one insertion hole 4 and the other insertion hole 5 are reduced.
[0034]
As mentioned above, although 1st-3rd embodiment was demonstrated, this invention is not limited to these, For example, what clamps the medical flexible tube which comprises the blood circuit and its accompanying flow path. In addition, it is applicable to what clamps other flexible tubes. In the above embodiments, the flexible tube is separated from the guide wall at the protruding portion, but any other means can be used as long as the inserted flexible tube is separated from the guide wall. It may be in the form of
[0035]
Furthermore, although the protrusions in the first to third embodiments are all integrally formed with the clamp device 1, a predetermined position of the clamp device 1 (for example, in the first embodiment) is separated from the protrusion. If there is, it may be formed by adhering or fusing to a guide wall, or an insertion hole in the second and third embodiments).
[0036]
【The invention's effect】
According to the first aspect of the present invention, the separating means for separating the flexible tube inserted between the first convex portion and the second convex portion from the guide wall is provided. Insufficient interruption of the fluid flow of the flexible tube can be avoided, and the workability of the clamp can be improved.
[0037]
According to the second aspect of the present invention, since the separating means includes the protruding portion protruding inward so as to position the inserted flexible tube at a position separated from the guide wall, the guide can be guided at the time of clamping with a simple configuration. The wall can prevent the fluid flow of the flexible tube from being insufficiently blocked, and can improve the workability of the clamp.
[0038]
According to the invention of claim 3, since the projecting portion is provided at a position deviating from the movement locus of the first convex portion or the second convex portion on the inner surface of the guide wall, it is more effectively and reliably flexible. The sex tube can be spaced from the guide wall.
[Brief description of the drawings]
FIG. 1 is a side view showing a flexible tube clamping device (pre-clamping state) according to a first embodiment of the present invention. FIG. 2 is a view taken along an arrow II in FIG. FIG. 4 is a side view showing a flexible tube clamping device (clamped state) according to the first embodiment of the present invention. FIG. 5 is a flexible view according to the second embodiment of the present invention. FIG. 6 is a side view showing a clamp device for a conductive tube.
7 is a cross-sectional view taken along the line VII-VII in FIG. 5. FIG. 8 is a side view showing a flexible tube clamping device according to the third embodiment of the present invention. Front view)
10 is a sectional view taken along line XX in FIG. 8. FIG. 11 is a side view showing a conventional flexible tube clamping device. FIG. 12 is a view taken along arrow XII in FIG. Fig. 14 is a cross-sectional view taken along line XIII. Fig. 14 (a) is a schematic view of the flexible tube C inserted through the insertion hole and shows a state before clamping. Cross-sectional schematic diagram showing [signs]
DESCRIPTION OF SYMBOLS 1 ... Clamp apparatus 2 ... One end part 3 ... Other end part 3a ... Engagement part 4 ... One insertion hole 5 ... The other insertion hole 6 ... 1st convex part 7 ... 2nd convex part 8 ... Guide wall 8a ... Inner surface 9 ... Protrusion (separation means)
10: Intermediate part 11, 12 ... Projection part (separation means)
13, 14 ... Projection (separation means)

Claims (3)

One end where the first convex portion is formed;
The other end formed with the second convex part facing the first convex part,
An intermediate portion connected to the one end and the other end;
An engaging portion that is formed at the other end and engages the one end;
When the one end is engaged with the engaging portion while the intermediate portion is bent while the flexible tube is inserted between the first convex portion and the second convex portion, A clamp device for a flexible tube that clamps the flexible tube close to a first convex portion and a second convex portion, and blocks the flow of fluid at the site,
A guide wall for guiding the one end portion to the engaging portion is erected from an edge of the first convex portion or the second convex portion, and is inserted between the first convex portion and the second convex portion. A flexible tube clamping device, comprising: a separating means for separating the flexible tube from the guide wall. 2. The flexible tube clamping device according to claim 1, wherein the spacing means comprises a projecting portion projecting inward to position the inserted flexible tube at a position spaced from the guide wall. 3. The flexible tube clamping device according to claim 2, wherein the protruding portion is provided at a position deviating from the movement locus of the first convex portion or the second convex portion on the inner surface of the guide wall.

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