JPH053824Y2 - - Google Patents

Description

[Detailed explanation of the idea] Background of the idea Technical field The present invention relates to a tube clamp.

Prior Art Tube clamps are used in catheters, blood circuits, etc., and temporarily restrict the flow of fluids flowing through the tube by holding the tube with clamping pressure that allows liquids such as blood and medicine to flow through the tube. It is intended to prevent

10 to 13 relate to a conventional tube clamp, FIG. 10 is a side view showing the conventional tube clamp, FIG. 11 is a side view similar to FIG. 10 showing the engaged state of the engaging means, Figure 12 is the 10th
FIG. 13 is a cross-sectional view taken along the - line in the figure, and FIG. 13 is a cross-sectional view showing the state in which the tube is held under clamping pressure.

In order to simplify the configuration, this tube clamp 10 is integrally molded with a rigid material such as a resin material so that the pair of clamp arms 11 can be bent freely via a loop-shaped curved part 12. A pair of presser portions 13 are formed at respective portions facing each other in the bending direction [direction A]. As shown in FIG. 12, the holding portions 13 form protrusions that project from the clamp arms 11, and are designed to clamp and press the tube 14 disposed across the holding portions 13. There is. That is, the clamping pressure of the tube 14 is
Move the clamp arm 11 as shown by arrow B around the curved part 12.
A presser part 1 that is bent in the direction and thereby forms a protrusion
Clamp the tube 14 between the tubes 14 and 3.
It is designed to prevent the flow of fluids such as blood and medicinal fluids flowing through the tube. At the tips of both clamp arms 11, there is a tube 14 which is held between the holding parts 13.
A pair of engagement means are formed that can maintain the clamping pressure state. That is, each of the engaging means consists of engaging claws 15A and 15B that can be engaged with each other, and when the engaging claw 15A is engaged with the engaging claw 15B as shown in FIG. This makes it possible to hold the tube 14 sandwiched between the tubes 13 under pressure.

At this time, the tube clamp 10 is
In order to avoid bending and damaging the tube 14 sandwiched between the tubes 14 and 3 at the pinching point, at least one tube contacting surface of both pressers 13 should be made flat (=both pressers 13 should not have uneven contact with each other). The tube should not have any contact surface that would cause the tube to come into contact with the tube. If the tube 14 is bent and damaged, this means there is a risk of fluid leakage, which is absolutely unacceptable in a medical tube clamp.

However, in the tube clamp 10 described above, in order to simplify the structure, the pair of clamp arms 11 are formed integrally through a bendable curved portion 12, and the tube 14 is not bent. To prevent sticking,
Both clamp arms 11
When the tube 14 is squeezed by the presser portions 13, when the tube 14 is wobbled and deformed in opposite directions in the transverse direction [D direction] of the tube 14, the presser portions 13 are mutually positioned in the transverse direction of the tube 14. There is a risk of misalignment. This is especially likely to occur when the tube is hard. In other words, when such a positional shift occurs, the tube 14 cannot be held under pressure by both pressers 13, and it becomes difficult to appropriately prevent the flow of fluid flowing through the tube 14. .

Purpose of the Invention An object of the present invention is to provide a tube clamp that reliably holds a tube under pressure and reliably blocks the flow of fluid passing through the tube.

Structure of the invention In order to achieve the above object, the invention forms a pair of clamp arms so as to be integrated through a bendable curved part, and attaches both clamps to the parts facing each other in the bending direction of both clamp arms. A tube clamp made of a rigid material, in which a pair of holding parts are formed to pinch the tube placed across the arm, and a pair of engagement means for holding the tube under pressure are formed on both clamp arms. The tube contact surfaces of the holding parts of both clamp arms are made flat, and the curved part side portion and the opposite curved part side part of both clamp arms, excluding the tube contact surface area, are designed to prevent the displacement of both clamp arms when clamping the tube. This tube clamp is characterized by forming a means for preventing this.

Specific Description of the Invention Hereinafter, embodiments of the invention will be described with reference to the drawings.

FIG. 1 is a side view showing a tube clamp according to an embodiment of the present invention, FIG. 2 is a side view similar to FIG. 1 showing the engaged state of the engaging means, and FIG. FIG. 4 is a cross-sectional view taken along the - line in FIG. 2, and FIG. 5 is a cross-sectional view taken along the - line in FIG. 2.

Any rigid material can be used for the tube clamp 20, but synthetic resin is preferable from the viewpoint of moldability and economic efficiency, and in particular, acetal resin, polyamide, such as nylon, etc., which have high fatigue strength, are preferable. It is integrally formed of these materials, and the pair of clamp arms 21A and 21B can be freely bent in the direction of arrow E through a loop-shaped curved portion 22. A holding portion 23A extending from the curved portion 22 to the side opposite to the curved portion is formed inside the clamp arm 21A of the mutually opposing clamp arms 21A and 21B. On the other hand, a presser portion 23B is formed inside the clamp arm 21B and extends to face the presser portion 23A.
The holding parts 23A and 23B have a trapezoidal cross section as shown in FIG. 3, and are positioned relative to each other.

When the tube clamp 20 is in the free state shown in FIG.
3A and the clamp arm 21B, the tube 24 which is disposed across the holding portion 23B can be clamped by moving the clamp arms 21A and 21B in the direction of arrow F. Each of the clamp arms 21A and 21B is moved by pushing the pressing portion 25A of the clamp arm 21A and the pressing portion 25B of the clamp arm 21B in the direction of arrow F with a finger. As a result, the clamp arms 21A and 21B are bent around the curved portion 22, and as shown in FIG. becomes possible. This makes it possible to prevent the flow of fluids such as blood and medical fluids flowing through the tube 24.

A pair of engagement means is formed on the side opposite to the curved portion of both the clamp arms 21A and 21B to maintain the clamping pressure state of the tube 24 between the respective holding portions 23A and 23B. Each engagement means includes an engagement claw 26A formed on the clamp arm 21A and an engagement claw 26B formed on the clamp arm 21B. Each of the engaging claws 26A and 26B is connected to both clamp arms 21A and 21 as shown in FIG.
By pushing B in the direction of arrow F, they can engage with each other, and this engagement makes it possible to hold the tube 24 between the holding parts 23A and 23B under pressure. Thereby, the flow of fluid passing through the tube 24 can be continuously blocked.

Both clamp arms 21A and 2 are on the side of the curved part 22 with respect to the holding part 23A of the clamp arm 21A and the holding part 23B of the clamp arm 21B.
At the time of clamping pressure of 1B, the first
A displacement prevention means 27 is formed. The first displacement prevention means 27 includes a displacement prevention body 28A formed on the left side of the clamp arm 21A in FIG. 4, and a displacement prevention body 28B formed on the right side of the clamp arm 21B in FIG. The anti-slip bodies 28A and 28B are attached to the clamp arm 21.
They are formed protruding from the inner surfaces facing each other in the bending direction [direction E] of A and 21B. The anti-slip body 28A is attached to the clamp arms 21A and 21B.
When the clamping force is applied in the direction of arrow F, the clamp arm 2
It can abut against the base end position on the curved part 22 side of the presser part 23B of 1B. On the other hand, when the clamp arms 21A and 21B are clamped in the direction of arrow F, the anti-slip body 28B prevents the holding portion 2 of the clamp arm 21A from
It is possible to abut against the base end position on the curved portion 22 side of 3A. As a result, both clamp arms 21A and 2
1B in the direction of arrow F, the slip prevention body 28A is located at the proximal end position of the holding portion 23B on the curved portion 22 side, and the slip prevention body 28B is placed at the base end position of the holding portion 23B on the curved portion 22 side.
The proximal end positions of the clamp arms 3A on the side of the curved portion 22 abut against each other, and displacement of the clamp arms 21A and 21B in the direction of arrow J is regulated.
In addition, each of the slip prevention bodies 28A and 28B prevents the tube 24, which is disposed transversely between the holding parts 23A and 23B, from falling into the loop-shaped space 29 when the clamp arms 21A and 21B are in the free state shown in FIG. This allows the tube 24 to be reliably placed between the holding parts 23A and 23B.

On the other hand, both clamp arms 21A are located on the side opposite to the curved part 22 with respect to the holding part 23A of the clamp arm 21A and the holding part 23B of the clamp arm 21B.
and 21B during clamping, the tube 24 can be prevented from being displaced in a direction different from that of the first displacement prevention means 27 in the transverse direction [G direction], and the second displacement prevention means are abutted against each other. 30 is formed. The second displacement prevention means 30 is located on the right side of the clamp arm 21A in FIG.
The left side in FIG. 5 of the anti-slip body 31A and the clamp arm 21B formed on the opposite side of the anti-slip body 28A with respect to the holding portion 23A;
That is, the slip prevention body 3 formed on the opposite side of the slip prevention body 28B with respect to the holding portion 23B
1B, each slip prevention body 31A and 31
B is formed to protrude from the inner surfaces facing each other in the bending direction [direction E] of the clamp arms 21A and 21B. The anti-slip body 31A is capable of colliding with the proximal end position of the holding portion 23B of the clamp arm 21B on the side opposite to the curved portion when the clamp arms 21A and 21B are clamped in the direction of arrow F. on the other hand,
The anti-slip body 31B is capable of abutting against the proximal end position of the holding portion 23A of the clamp arm 21A on the side opposite to the curved portion when the clamp arms 21A and 21B are clamped in the direction of arrow F. As a result, when both clamp arms 21A and 21B are pushed in the direction of arrow F, the slip prevention body 31A moves to the base end position on the side opposite to the curved part of the holding part 23B, and the slip prevention body 31B moves to the opposite position of the holding part 23A. The base end positions on the curved part side are abutted against each other, and each clamp arm 21A
The positional shift of 21B and 21B in the direction of arrow K is regulated.

Specific effects of the invention Next, the tube clamp 20 according to the above embodiment
The case where this is used, for example, for clamping the tube 24 in the blood storage bag 40 shown in FIG. 6 will be explained.

The blood storage bag 40 is capable of storing blood therein, and is connected to a tube 24 for blood collection. A blood sampling needle 41 is attached to the tip of the tube 24 connected to the bag 40.
By puncturing the human arm 42, blood flows into the bag 40. Buzz 4
When the inside of the tube 24 is filled with blood, the tube 24 is clamped by the tube clamp 20. The tube 24 is clamped by placing the tube 24 between the holding portions 23A and 23B of the tube clamp 20 and holding the tube 24 under clamping pressure. To maintain the clamping pressure of the tube 24, move the clamp arms 21A and 21B with your fingers in the direction of arrow F.
to put the tube 24 in a clamped state,
Further, the engaging claws 26A and 26B are engaged with each other. In this state, the blood collection needle 41 is removed from the arm 42, and the blood storage bag 40 is stored at a predetermined temperature with the tube 24 sealed by a tube sealing means (not shown). Furthermore, when performing a blood transfusion from the blood storage bag 40, after the blood in the bag 40 has been warmed up to a predetermined temperature, a blood transfusion tube is connected to the blood transfusion connection part 43, whereby the blood is introduced into the body from the tube. It is intended to supply blood.

According to the above embodiment, the following effects are achieved.

The pair of clamp arms 21A and 21B are formed into one body via a bendable curved portion 22, and the structure is simple.

Holding part 2 of both clamp arms 21A, 21B
The tube contact surfaces of the tubes 3A and 23B are flat, and as a result both presser portions 23A and 23
Since the tubes B do not engage each other unevenly, the tube 24, which is pinched by both presser parts 23A and 23B, is not bent and damaged at the pinching point, and the fluid inside the tube does not leak.

When the tube 24 is squeezed, the clamp arms 21A, 21B are designed to prevent the clamp arms 21A, 21B from shifting in opposite directions in the tube transverse direction on the curved portion side portion and the non-curved portion side portion, excluding the tube contact surface area. Means to prevent 2
7 and 30, it is possible to prevent both the clamp arms 21A and 21B from wobbling and deforming in opposite directions in the transverse direction of the tube 24 during the tube clamping process by the both presser parts 23A and 23B. The holding parts 23A and 23B can be attached to the tube 24 without causing any positional deviation from each other.
can be reliably held under pressure, and the flow of fluid passing through the tube 24 can be reliably blocked.

Displacement prevention means 27 provided on the curved part side part
This can prevent the tube from falling into the loop-shaped space 29 of the curved portion.

The tube clamp shown in Figures 7 to 9 is
A modification of the tube clamp according to the above embodiment is shown. Figure 7 is a side view of the tube clamp.
FIG. 8 is a sectional view showing the tip side of the tube clamp, and FIG. 9 is a sectional view showing the curved part side of the tube clamp. This tube clamp 70
is the holding portion 23A on the tip side for the curved portion 22.
A slip prevention body 71A is provided on one side of the holding portion 23A on the side of the curved portion 22, and a slip prevention body 71B is provided on the other side of the holding portion 23A on the curved portion 22 side. The anti-slip body 71A is the clamp arm 2
When 1A and 21B are squeezed, they are opposed to the presser portion 23B as shown in FIG. 8, and can collide with each other. Furthermore, when the clamp arms 21A and 21B are clamped, the anti-slip body 71B is opposed to the holding portion 23B as shown in FIG. 9, so that it can collide with the holding portion 23B. This makes it possible to prevent displacement of the clamp arm 21A in the direction of arrow J and of the clamp arm 21B in the direction of arrow K. In addition, the shift prevention body 71B on the curved part side
This prevents the tube from falling into the loop-shaped space 29.

Concrete Effects of the Invention As described above, according to the present invention, in a tube clamp that has a simple structure and does not cause bending damage to the tube due to mutual uneven engagement of both presser parts, the presser parts are positioned relative to each other. The tube can be reliably held under pressure without causing any displacement, and the flow of fluid passing through the tube can be reliably blocked.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a tube clamp according to an embodiment of the present invention, FIG. 2 is a side view similar to FIG. 1 showing the engaged state of the engaging means, and FIG. 4 is a sectional view taken along the - line in Fig. 2, Fig. 5 is a sectional view taken along the - line in Fig. 2, and Fig. 6 is a sectional view showing the state in which the tube is held under pressure. A front view showing a state in which the tube clamp is used, FIGS. 7 to 9 relate to a tube clamp showing a modified example, FIG. 7 is a side view of the tube clamp, and FIG. 8 is a sectional view showing the tip side of the tube clamp. , FIG. 9 is a sectional view showing the curved part of the tube clamp, FIG. 10 is a side view showing the conventional tube clamp, FIG. 11 is a side view showing the engaged state of the engaging means of the conventional tube clamp, and FIG. Figure 12 is a sectional view taken along the - line in Figure 10;
FIG. 13 is a sectional view showing the state in which the tube is held under pressure. 10, 20...tube clamp, 11, 21
A, 21B... Clamp arm, 12, 22...
Curved part, 13, 23A, 23B... Presser part, 1
4, 24...Tube, 15A, 15B, 26
A, 26B...Engaging claw, 27, 30...Slip prevention means, 28A, 28B, 31A, 31B, 71
A, 71B...Slip prevention body, A, E...Bending direction, D, G...Transverse direction.

Claims (1)

[Scope of utility model registration request] A pair of clamp arms are molded so as to be integrated through a bendable curved part, and tubes placed across both clamp arms are sandwiched between opposite parts of both clamp arms in the bending direction. A tube clamp made of a rigid material, in which a pair of pressing parts are formed, and a pair of engaging means for holding the tube under pressure are formed on both clamp arms, the tube contacting part being provided by the pressing parts of both clamp arms. A tube characterized in that the surface is flat and a means for preventing displacement of both clamp arms when clamping the tube is formed on the curved part side part and the opposite curved part side part of both clamp arms excluding the tube contact surface area. clamp.