JP3937570B2 - Clamp - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a clamp disposed in the middle of a liquid feeding tube constituting a medical instrument such as an infusion / transfusion set. More particularly, the present invention relates to a recyclable clamp that can be easily attached to an infusion / transfusion set.
[0002]
[Prior art]
Conventionally, there is a roller clamp as a clamp attached to an infusion / transfusion set or the like. The roller clamp allows the flow rate of the fluid to be adjusted by gradually reducing the cross-sectional area of the tube by rotating the peripheral surface of the roller while pressing it against the tube in the diametrical direction.
[0003]
In order to attach the conventional roller clamp to an infusion / blood transfusion set, etc., the roller clamp is put in advance through the liquid feeding tube of the parts before assembling each part of the infusion / blood transfusion set. As a mounting method, with the roller moved to the side that opens the liquid feeding tube in the housing, the tip of the liquid feeding tube is inserted into the housing insertion port on the side where the roller is located, and gradually into the insertion passage After pushing forward to push the tip of the liquid feeding tube out of the housing, the roller clamp was moved to a predetermined position on the liquid feeding tube. Alternatively, the assembly is performed by inserting the liquid feeding tube into the housing before assembling the housing and roller, which are the components of the roller clamp, and then press-fitting the support shaft of the roller through one of the insertion holes of the housing. It was.
[0004]
[Problems to be solved by the invention]
However, in the former method, there is a problem that the installation work takes time and the work efficiency is poor, and in the latter, the support shaft of the roller is press-fitted, so it is painful for the worker when attaching clamps to many tubes. Met.
[0005]
In addition, the clamp is not in direct contact with the drug solution administered to the human body and does not form an infection route such as bacteria to the human body. In recent years, infusions and blood transfusion sets are disposed of after use, and waste disposal is considered a social problem. In recent years, infusions and blood transfusion sets in line with such circumstances have not been provided. It is.
[0006]
An object of the present invention is to provide a clamp that is easy to attach and detach a liquid feeding tube and can be recycled.
[0007]
That is, the present invention provides a first member (b1, b2) comprising an upper part (b1) and a lower part (b2),
A second member (C) interposed adjacently between the upper part (b1) and the lower part (b2) of the first member;
A clamp composed of a shaft (A) through which the first member (b1, b2) and the second member (C) are rotatably inserted ;
The first member (b1, b2) forms a tube insertion path (b12, b22) that opens to the periphery,
The second member (C) is a portion (C21) corresponding to the tube insertion path of the first member (b1, b2) ;
Forming a tube insertion passage (C2) having a through groove (C22) formed in an arc from the portion (C21) corresponding to the tube insertion passage toward the end point (C23) ;
Clamp, characterized by a tube (D) and is positioned anywhere in the tube insertion passage of the second member (C2) to press or release the tube (D).
[0008]
A second aspect of the present invention is the clamp according to the first aspect, wherein the first member has an upper portion and a lower portion which are adjacent to each other in the upper and lower directions and are mutually non-rotatable.
[0009]
A feature of the present invention is that an opening for attaching and detaching a tube is formed along the longitudinal direction of the tube by arranging the opening of the tube insertion passage of the second member at a position corresponding to the opening of the tube insertion passage of the first member. Therefore, it is possible to attach the clamp to the tube very easily. In addition, the tube insertion passage formed by the first member and the second member is not formed with one end in the longitudinal direction narrower than the other end like a roller clamp, but is uniform over the entire length of the tube insertion passage. Therefore, the clamp of the present invention is extremely easy to attach to the tube as compared with the roller clamp.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below, but the present invention is not necessarily limited thereto.
[0011]
The clamp of the present invention has (a) a shaft that is inserted into an insertion hole formed in the first member and the second member, and (b) a tube insertion passage that has an insertion hole of the shaft and opens to the periphery. The first member (c) has an insertion hole through which the shaft is inserted, and is formed in an arc shape from the portion corresponding to the tube insertion passage of the first member toward the end point direction from the portion corresponding to the tube insertion passage. And a second member that forms a tube insertion passage having a through groove .
[0012]
The clamp is configured so that the tube in the tube insertion passage of the second member is positioned in the direction in which the width of the through groove is reduced as the second member and / or the first member rotates. The opening area is gradually reduced, or the opening area of the tube is gradually increased by being positioned in the direction in which the width of the through-groove becomes wider, so that the flow rate of the chemical liquid flowing in the tube is reduced or increased. .
[0013]
Hereinafter, the example of the clamp of this invention is demonstrated concretely using FIGS.
[0014]
[First Member] As shown in FIGS. 1 and 2, the first member includes an upper part b1 and a lower part b2. The upper part b1 and the lower part b2 are located away from each other, and the upper part b1 and the lower part b2 are non-rotatably fastened to an axis A that penetrates through holes b11 and b21 formed near the respective centers. Tube insertion paths b12 and b22 that open to the periphery are formed coaxially on the periphery of each of the upper part b1 and the lower part b2 of the first member. The sizes of the tube insertion passages b12 and b22 are such that the clamp attached to the tube D does not slide down from a predetermined position on the tube, that is, the tube is pressed by the tube insertion passage. It is preferably formed so that the shape hardly changes. As a guide, it is preferably the same diameter as the outer diameter of the tube or slightly smaller (about -0.1 mm). As such a tube insertion passage, a tube insertion passage whose diameter is made slightly smaller than the tube diameter or a part of the inner walls of the tube insertion passages b12 and b22 are made smaller than the tube diameter and a tube gripping portion (not shown). And the clamp is formed so that the clamp is positioned at a predetermined position on the tube.
[0015]
Further, as shown in FIG. 3, the tube insertion passages b12 and b22 have openings b13 and b23 for attaching and detaching the tube on the periphery of the first member. The openings b13 and b23 facilitate the tube attaching and detaching operation. Therefore, it is preferable that the diameter is substantially the same as the diameter of the tube insertion passages b12 and b22, or formed slightly smaller than the diameter of the tube insertion passages b12 and b22.
[0016]
As shown in FIGS. 1 and 2, the first member is not necessarily provided above and below the second member C, and may be only one of the upper and lower portions of the second member C, but will be described later. It is arranged above and below the second member C to keep the adjusted flow in the tube straight by keeping the tube D pressed straight by the through groove formed in the second member C. preferable. Further, by providing the first member above and below the second member, the contact area between the first member and the second member is doubled, and the frictional force of the contact surface is increased. It is also effective and preferable as means for preventing the natural movement of the two members C.
[0017]
[Second member]
As shown in FIGS. 1 and 2, the second member C is interposed between the upper part b1 and the lower part b2 of the first member, and the shaft A is inserted near the center of the second member C. An insertion hole C1 is formed. That is, the second member C is prevented from moving in the vertical direction by the upper part b1 and the lower part b2 of the first member, and can rotate about the axis A that passes through the through hole C1, and the first member b1, b2 In the relationship, the rotation is possible in the opposite direction and the same direction.
[0018]
Further, as shown in FIG. 4, the second member C has a portion C21 that opens to the periphery and corresponds to the tube insertion paths b12 and b22 formed in the first members b1 and b2, and a width from the portion C21. A tube insertion passage C2 having a gradually narrowing through groove C22 is formed.
[0019]
The through groove C22 has an end point C23 at any location of the second member C. The width of the through groove C22 in the vicinity of the end point C23 is equal to or less than the thickness when the tube D is completely crushed, preferably about the same as the thickness of the tube D. Although the tube D is completely closed by positioning the tube D at the same position as the wall thickness of the tube D in the through groove C22, the width of the through groove in the vicinity of the end point C23 and the end point is set to the thickness of the tube. If it is the same level, the operator can feel that the tube is completely closed by touching a part of the tube with the end point C23, and can visually confirm it. Because.
[0020]
For example, as shown in FIG. 4, the through groove C22 may be formed in an arc shape from the portion C21 corresponding to the tube insertion paths b12 and b22 formed in the first members b1 and b2 toward the end point. The length from the portion C21 having substantially the same diameter as the tube diameter to the end point C23 is limited to the same length as the circumference of the longest second member, but a longer length is preferable because fine flow control is possible.
[0021]
Similarly to the tube insertion passage openings b13 and b23 of the upper part b1 and the lower part b2 of the first member, the opening C24 of the tube insertion passage C2 has substantially the same diameter as the tube insertion passage so that the tube can be easily attached and detached. It is preferable to form it slightly smaller.
[0022]
[axis]
As shown in FIG. 2, the shaft A only needs to be inserted through the first members b1, b2 and the second member C so as to be able to rotate with each other, but either the first member or the second member C It is preferably fixed. That is, when the shaft A and the first members b1 and b2 are fixed, the second member C is rotatable about the shaft A, and when the shaft A and the second member C are fixed, It is preferable that one member b1, b2 is rotatable about the axis A. For example, when the first member is fixed to the shaft A, when the first member and the second member are rotated in the opposite directions, the second member rotates about the shaft A, but the first member rotates the shaft A. Because the operator cannot rotate to the center, the operator needs only the minimum rotational operation necessary for displacing the tube to a desired location in the tube insertion passage C21, and the operability is good. The case where the second member is fixed to the shaft A is also preferable for the same reason as described above.
[0023]
For example, as shown in FIG. 1, the shaft has a member A1 having both ends formed in a wedge shape, and a fitting portion A21 that fits into a wedge-shaped portion A111 at both ends of the member A1, and extends from the fitting portion A21. And a cover member A2 partially covering the side surface of the clamp. The shaft A and the first member / second member may be fixed to either the member A1 or the cover member A2 each having a wedge shape at both ends, and the fixing method is any method such as adhesion, press-fitting, and welding. It may be.
[0024]
The clamp shown in FIGS. 1 and 2 has, for example, the cover member A2, and is operated by rotating the first members b1, b2 and the second member C2 in the opposite direction or the same direction.
[0025]
The clamp of the present invention has no need for sterilization treatment, so there is no need to consider the fear of strange odor, discoloration, deformation, etc. due to sterilization, and it may have the advantage that the degree of freedom of material selection is large. The recycle clamp of the present invention may be used many times, and therefore it is preferable that the recycle clamp has strength. For example, a metal such as aluminum or stainless steel or a ceramic Etc. Or if it is a thing made from a synthetic resin, a polycarbonate, a polypropylene, a polyethylene, a polyacetyl, an ABS resin etc. will be mentioned, for example, It is not limited to these. Further, the first members b1, b2, the second member C, and the shaft A may be made of different materials or the same material.
[0026]
Next, the manner in which the tube is pressed by the clamp of the present invention will be described with reference to FIGS. The first member is indicated by a solid line, and the second member is indicated by a broken line. In FIG. 5A, a portion C21 corresponding to the tube insertion passages b12 and b22 formed in the first member of the tube insertion passage of the second member C is coaxial with the tube insertion passages b12 and b22 of the first member. A tube attachment / detachment opening is formed, and the tube attached to the clamp is in a state in which the maximum flow rate of the liquid flowing through the tube is ensured. The tube attachment / detachment port is formed over the entire length in the longitudinal direction of the tube, and the attachment / detachment of the tube is easy.
[0027]
In FIG. 5B, the first members b1, b2 and the second member C are reversely rotated around the axis A, and the tube D is located in the middle of the through groove C22 of the second member C. FIG. The opening cross section of the tube is made small by the through groove C22, and the flow rate of liquid flowing through the tube D is limited.
[0028]
In FIG.5 (c), the tube D is contact | abutting to the end point C23 of the penetration groove | channel C22, and the tube D is completely obstruct | occluded by the penetration groove | channel C22 which has a width | variety comparable as the thickness of the tube D, and the inside of a tube is carried out. The flow of flowing liquid is completely blocked. Also, the reverse operation of FIGS. 5A to 5C can be performed.
[0029]
【Example】
Next, an embodiment of the clamp according to the present invention will be described in detail with reference to FIGS. The outer shape of the clamp of the present invention shown in FIGS. 1 and 2 is generally cylindrical, and is composed of three layers in which an upper part b1, a second member C, and a lower part b2 of the first member are adjacent to each other. Yes. Circular insertion holes b11, b21, C1 are formed near the center of the upper part b1, the second member C, and the lower part b2 of the first member, and the insertion holes b11, b21, C1 A member A1 having both ends formed in a wedge shape is inserted by press-fitting. The wedge-shaped part A111 of the member A1 is connected to a U-shaped cover member A2 having a fitting part A21 and extending from the fitting part A21 and partially covering the side surface of the clamp.
The insertion holes on the side of the first members b1 and b2 that are not adjacent to the second member C are formed slightly wider than the maximum outer diameter of the wedge-shaped portion A111 of the member A1, and the wedge-shaped portion A111 of the fitting portion A21. The surface A211 in contact with the wedge-shaped portion A111, the insertion holes b111, b211 formed slightly wider than the maximum outer diameter of the wedge-shaped portion A111, and the surface A212 in contact with the insertion holes b111, b211 of the fitting portion A21 are fixed by adhesion. ing. Therefore, rotation between the upper part b1 of the first member and the lower part b2 of the first member and between the shaft A and the first member is impossible.
[0030]
As shown in FIG. 3, tube insertion paths b12 and b22 that open to the periphery are formed in the upper part b1 of the first member and the lower part b2 of the first member. The tube insertion passages b12 and b22 are formed to be slightly smaller than the outer diameter of the tube that is generally inserted, and the peripheral opening is formed to be slightly smaller than the diameter of the tube insertion passages b12 and b22.
[0031]
As shown in FIG. 4, the second member C is formed with a portion C2 having the same shape as the tube insertion passage formed in the upper portion b1 of the first member and the lower portion b2 of the first member. Has a through groove C22 that is gradually narrowed. The through groove C22 has an end point C23 on the second member, and the end point C23 is located in the vicinity of the periphery that is approximately ¼ of the circumference from the opening C24 on the periphery. The width of the through groove C22 is gradually narrowed toward the end point C23, but the width between the vicinity of the end point and the end point C23 is formed slightly narrower than the thickness of the crushed tube, and the tube contacts the end point C23. The tube is completely occluded when contacting.
[0032]
【The invention's effect】
From the above, the clamp according to the present invention has the tube attachment / detachment opening formed over the entire length in the longitudinal direction of the tube, so that the attachment / detachment workability of the tube is good, and the following effects are associated with this effect. Also play.
(1) Like an infusion / blood transfusion set, it is possible to improve the efficiency of the operation of assembling a medical device provided with a clamp attached in advance.
(2) Even in a medical device to which the clamp of the present invention is not mounted, the clamp can be mounted when necessary.
(3) Since the clamp of the present invention is extremely easy to attach and detach, it is easy to recycle (use multiple times) and help solve the problem of medical waste.
(4) Conventionally, a transfusion / transfusion set without a clamp attached in advance is provided in place of a medical device provided with a clamp attached in advance, such as an infusion / transfusion set. By installing and using the clamp of the invention at the time of use, the cost of the infusion / transfusion set can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a clamp according to the present invention.
FIG. 2 is a cross-sectional view of the clamp of the present invention shown in FIG. 1 taken along the line aa ′.
FIG. 3 is a plan view showing a first member of the clamp of the present invention shown in FIG. 1;
FIG. 4 is a plan view showing a second member of the clamp of the present invention shown in FIG.
FIG. 5A is a diagram showing a state in which the maximum flow rate of the liquid flowing through the tube is ensured.
(B) It is a figure which shows the state in which the tube D is located in the middle of the penetration groove | channel C22 of the 2nd member C.
(C) It is a figure which shows the state by which the tube D is completely obstruct | occluded by the through-groove C22, and the distribution | circulation of the liquid of a tube is prevented completely.
[Explanation of symbols]
A Axis A1 Member A111 with both ends formed in a wedge shape Cover member A21 Cover member A21 Fitting portion A211 A surface of the fitting portion A21 that contacts the wedge-shaped portion A111 A212 A surface b1 that contacts the insertion holes b111 and b211 of the fitting portion A21 Upper part b2 of one member Lower parts C1, b11, b21 of first member Insertion holes b111, b211 Insertion holes C2, b12, b22 formed slightly wider than the maximum outer diameter of the wedge-shaped part A111 Tube insertion passages C23, b13, b23 Tube insertion Passage opening C21 Portion C22 corresponding to tube insertion passage of first member Through groove C23 End point D Tube

Claims (1)

A first member (b1, b2) comprising an upper part (b1) and a lower part (b2);
A second member (C) interposed adjacently between the upper part (b1) and the lower part (b2) of the first member;
A clamp composed of a shaft (A) through which the first member (b1, b2) and the second member (C) are rotatably inserted ;
The first member (b1, b2) forms a tube insertion path (b12, b22) that opens to the periphery,
The second member (C) is a portion (C21) corresponding to the tube insertion path of the first member (b1, b2) ;
Forming a tube insertion passage (C2) having a through groove (C22) formed in an arc from the portion (C21) corresponding to the tube insertion passage toward the end point (C23) ;
Clamp, characterized by a tube (D) and is positioned anywhere in the tube insertion passage of the second member (C2) to press or release the tube (D).

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