JP5989231B2 - Clamp - Google Patents

Description

  The present invention relates to a clamp that closes a flow path in a flexible tube when a blood component preparation is manufactured.

  In the manufacture of blood component preparations, a blood bag system including a plurality of bags and a plurality of tubes connecting the plurality of bags is used for separating and storing whole blood into blood components and storing and storing them in a plurality of storage bags. It is used. In addition, when blood treatment is performed with a blood bag system, a clamp that can block the flow path of the tube and switch the communication state between the bags is used.

  In general, a clamp includes a first clamping portion and a second clamping portion that are connected to each other by a bent portion so that the tube can be closed by closing the first clamping portion with respect to the second clamping portion. It has become. In addition, according to the clamp of following patent document 1, a pair of wall part which a tube penetrates is provided in the inner surface of a 2nd clamping part, and the press part which can be freely entered into a pair of wall part in the inner surface of a 1st clamping part Is provided. And the press part which entered in a pair of wall part presses a tube, and the flow path of a tube is obstruct | occluded.

  Moreover, as disclosed in Patent Document 1 below, the pressing portion of the clamp is provided with a locking portion that locks the pair of wall portions in the opening direction. Therefore, even if the elastic force of the tube is received, the pressing portion does not move in the opening direction, and the flow path of the tube can be continuously closed.

Japanese Patent Laid-Open No. 02-4384

Here, when the pressing portion enters the pair of wall portions, the posture of the pressing portion may be orthogonal to the tube, or the posture of the pressing portion may be inclined to a perpendicular to the tube.
Further, as shown in FIG. 10, even when the inner space of the tube 101 is crushed by the pressing of the pressing portion 100 and the flow path of the tube 101 is closed, the posture of the pressing portion 100 is orthogonal to the tube 101. Sometimes (see FIG. 10 (a)), the pressing part 100 is sometimes tilted in the direction perpendicular to the tube (see FIG. 10 (b)).
Further, the amount of the locking portion 102a when the pressing portion 100 is tilted enters the pair of wall portions 103 and 103 more than the locking portion 102b when the posture of the pressing portion 100 is orthogonal. Can be locked to the wall 103.

On the other hand, the locking portion 102a when the posture of the pressing portion 100 is orthogonal is small in the amount of entering the pair of wall portions 103, 103, and the locking portion 102a may not be locked.
Therefore, in order to lock the locking portion 102 a to the wall portion 103, the pressing portion 100 needs to further enter the pair of wall portions 103 and 103.
However, the internal space of the tube 101 has already been crushed. Therefore, in order to allow the pressing portion to enter the pair of wall portions 103 and 103, a large force that excessively crushes and deforms the meat pressure portion of the tube 101 is required, and it is difficult to close the tube 101. .

  The present invention is an invention created to solve the above-mentioned problem, and in order to lock the locking portion, the operation of pressing the pressing portion and excessively crushing and deforming the pressure portion of the tube is performed. It is an object to provide a clamp that can be avoided.

  In order to solve the above-mentioned problem, a clamp according to the present invention includes a first clamping part, a second clamping part arranged to face the first clamping part, a rear end part of the first clamping part, A bent portion connecting the rear end portion of the second clamping portion, and a tube extending in the front-rear direction is disposed on the inner surface of the second clamping portion, and the first clamping portion and the second clamping portion A clamp for sandwiching the tube by a pair of wall portions including a first wall portion on the front side and a second wall portion on the rear side projecting from the inner surface of the second clamping portion, A pressing portion that can freely enter and exit between the pair of wall portions projects from the inner surface of the one clamping portion, and a front portion of the pressing portion is engaged with the first wall portion in the opening direction. When the stop portion is formed and the first sandwiching portion is closed with respect to the second sandwiching portion, the first wall portion contacts the inner surface of the first sandwiching portion. The first sandwiching portion is formed by further closing the first sandwiching portion which is formed so that only the second wall portion is in contact with the inner surface of the first sandwiching portion without contacting the second wall portion. Is bent, and the pressing portion tilts with the second wall portion as a fulcrum.

  In the invention of the present application described above, the pair of wall portions has a protrusion amount of the second wall portion on the rear side larger than a protrusion amount of the first wall portion, and the first clamping portion is When the second sandwiching portion is closed, it is preferable that the second wall portion having a larger projection amount than the first wall portion is in contact with the inner surface of the first sandwiching portion. Alternatively, when the inner surface of the first sandwiching portion protrudes inward on the rear side of the pressing portion rather than the front side of the pressing portion, the first sandwiching portion is closed with respect to the second sandwiching portion. In addition, it is preferable that the second wall portion is in contact with the inner surface of the first clamping portion and the inner surface of the rear side of the pressing portion.

According to the present invention described above, when the clamp is used, the first clamping part with which the second wall part comes into contact is bent by operating the second clamping part to be closed with respect to the second clamping part as usual. However, the pressing portion enters the pair of wall portions.
And the press part which entered in a pair of wall part will incline to a rear side by using a 2nd wall part as a fulcrum, and will press a tube, inclining, without orthogonally crossing a tube.
Therefore, since the pressing part which presses a tube inclines, the operation | work which presses a pressing part in order to lock a locking part and crushes and deform | transforms the thickness of a tube can be avoided.

  According to the present invention, since the locking portion is locked to the wall portion, it is possible to provide a clamp that can avoid the operation of pressing the pressing portion to crush and deform the meat pressure portion of the tube.

It is the perspective view which looked at the clamp concerning an embodiment from the slant. It is the side view which looked at the clamp concerning an embodiment from the side. In the clamp which concerns on embodiment, it is the side view which looked at the state which the 1st latching | locking part latches to the to-be-latched part from the side surface. In the clamp which concerns on embodiment, it is the side view which looked at the state which the front-end | tip of the 2nd wall part contact | abutted to the 1st clamping part from the side surface. In the clamp which concerns on embodiment, it is the side view which looked at the state which the 2nd latching | locking part latches to the to-be-latched part. It is the side view which looked at the 1st modification of the clamp concerning an embodiment from the side. It is the side view which looked at the 2nd modification of the clamp concerning an embodiment from the side. It is the side view which looked at the 3rd modification of the clamp concerning an embodiment from the side. It is the side view which looked at the 4th modification of the clamp concerning an embodiment from the side. It is a figure for demonstrating a prior art, Comprising: (a) is a figure which shows when a press part is orthogonal to a tube, (b) is a figure which shows when a press part inclines to a tube.

(Clamp)
Next, an embodiment of a clamp according to the present invention will be described with reference to the drawings.
The clamp 1 is for sandwiching the tube and closing the flow path of the tube during blood processing in the blood bag system. Alternatively, the clamp 1 is used to close the tube during infusion.
As shown in FIGS. 1 and 2, the clamp 1 according to the embodiment is a portion for sandwiching the tube 2, and is a substantially rectangular plate-like first and second sandwiching portions 10 and 20, and a first sandwiching portion. A bent portion 30 having a substantially arcuate shape in side view connected to each of an end portion in the longitudinal direction of the portion 10 and an end portion in the longitudinal direction of the second sandwiching portion 20.
In addition, the clamp 1 according to the embodiment is manufactured by injection molding so that the first sandwiching portion 10, the second sandwiching portion 20, and the bent portion 30 are integrated. The shape of the clamp 1 at the time of manufacture is substantially L-shaped when viewed from the side.
In addition, as shown in FIG. 2, in each of the longitudinal direction of the 1st clamping part 10 and the longitudinal direction of the 2nd clamping part 20, the direction where the bending part 30 is not connected is called a front side, and the bending part 30 connects. This is referred to as the rear side.

(Bent part)
As shown in FIG. 2, the bent portion 30 is formed thinner than the first sandwiching portion 10 and the second sandwiching portion 20, and when the first sandwiching portion 10 is opened and closed with respect to the second sandwiching portion 20. It is designed to bend. Therefore, the clamp 1 having a substantially L-shape in a side view (see FIG. 2) at the time of manufacture becomes substantially U-shaped in a side view (see FIG. 3) when the bent portion 30 is bent. Two clamping parts 20 are arranged to face each other.
As shown in FIG. 1, a hole 31 that penetrates the inner surface 30 a and the outer surface 30 b of the bent portion 30 is formed in the bent portion 30. Therefore, the tube 2 can pass through the bent portion 30 and the bent portion 30 is more easily bent.

(First clamping part)
As shown in FIG. 2, a pressing portion 11 that protrudes from a substantially central portion of the inner surface 10 a is formed on the inner surface 10 a of the first sandwiching portion 10. When the first clamping unit 10 and the second clamping unit 20 are arranged to face each other, the pressing unit 11 is orthogonal to the inner surface 20a of the second clamping unit (see FIG. 3).
Moreover, the width | variety of the front-end | tip part 11a of the press part 11 becomes narrow as it goes to the front-end | tip part 11a side from the base part 11b side. Therefore, it is easy to insert the pressing portion 11 between a first wall portion 21 and a second wall portion 22 described later of the second sandwiching portion 20.

As shown in FIG. 2, the front surface of the pressing portion 11 is provided with a first locking portion 12 and a second locking portion 13 that protrude from the front surface in a substantially triangular shape in a side view. The first locking portion 12 is disposed on the tip portion 11a side in the direction in which the pressing portion 11 protrudes, and the second locking portion 13 is disposed on the base portion 11b side in the direction in which the pressing portion 11 protrudes. ing.
The 1st latching | locking part 12 is equipped with the 1st latching surface 12a which turns to the base 11b side in the direction which the press part 11 protrudes, and comprises the surface perpendicular | vertical with respect to the direction where the press part 11 protrudes. .
Similarly to the first locking portion 12, the second locking portion 13 faces the base portion 11b in the direction in which the pressing portion 11 protrudes, and forms a surface perpendicular to the direction in which the pressing portion 11 protrudes. A second locking surface 13a is provided.

(Second clamping part)
As shown in FIG. 2, the second sandwiching portion 20 is provided with a front first wall portion 21 and a rear second wall portion 22 that are divided into front and rear portions and project from the inner surface 20 a. The first wall portion 21 and the second wall portion 22 are separated in the front-rear direction, and the pressing portion 11 of the first sandwiching portion 10 enters between the first wall portion 21 and the second wall portion 22. It can be tilted. In the inner surface 20a, a portion sandwiched between the first wall portion 21 and the second wall portion 22 is referred to as a contact surface 23 in the following description.

  When the pressing part 11 enters between the first wall part 21 and the second wall part 22 at the rear part of the first wall part 21, the first locking part 12 and the second locking part of the pressing part 11. A groove 24 into which 13 is loosely fitted is formed. Further, on the wall surface constituting the groove 24, a locked surface 24 a on the distal end side in the protruding direction of the first wall portion 21 is formed to be perpendicular to the protruding direction of the first wall portion 21. Therefore, when the pressing portion 11 is about to leave from between the first wall portion 21 and the second wall portion 22, the first locking surface 12a or the second locking surface 13a is locked to the locked surface 24a. Thus, the exit of the pressing portion 11 is restricted.

  On the base side of the first wall portion 21 and the base side of the second wall portion 22, holes 21 a and 22 a that penetrate in the front-rear direction and have substantially the same diameter as the tube 2 are formed. For this reason, the tube 2 can be arrange | positioned on the contact surface 23 by letting the tube 2 pass the hole 21a, 22a.

The protruding amount of the second wall portion 22 is larger than the protruding amount of the first wall portion 21. Therefore, when the clamp 1 is substantially U-shaped in a side view (see FIG. 3), the distal end surface 22 b of the second wall portion 22 is more than the first clamping portion than the distal end surface 21 b of the first wall portion 21. 10 is close to the inner surface 10a.
In addition, the 2nd wall part 22 protrudes to such an extent that it can contact | abut to the inner surface 10a of the 1st clamping part 10 when the press part 11 presses the tube 2 and the flow path of the tube 2 obstruct | occludes.

The outer surface 10b of the first clamping unit 10 and the outer surface 20b of the second clamping unit 20 are provided with a plurality of projections 14 and 24 that project from the outer surface, so that the fingers of the operator can be easily engaged.
Further, notches 11d, 21d, and 22d for weight reduction are formed on the side surface of the pressing portion 11, the side surface of the first wall portion 21, and the side surface of the second wall portion 22, respectively.

(how to use)
Below, the usage method of the clamp 1 which concerns on embodiment is demonstrated, referring FIGS. 3-5. As shown in FIG. 3, when the front-rear direction is described in the closing operation, the second sandwiching portion 20 is used as a reference, the direction where the bent portion 30 is not connected is the front side, and the direction where the bent portion 30 is connected is the rear side. This will be described as a side. Further, when explaining the vertical direction in the closing operation, the tip of the second wall portion 22 is set as the upper side and the base portion of the second wall portion 22 is set as the lower side based on the direction in which the second wall portion 22 protrudes. explain.

(Mounting method)
A method for attaching the clamp 1 to the tube 2 will be described.
As shown in FIG. 3, the tube 2 of the blood bag system (not shown) is passed through each of the hole 21a, the hole 22a, and the hole 31a of the clamp 1. Here, the hole 21 a and the hole 22 a have the same diameter as the tube 2. Therefore, the clamp 1 is attached to the tube 2 in a state where the tube 2 is in contact with the inner peripheral surfaces of the holes 21a and 22a.

Further, as shown in FIG. 3, when the clamp 1 is attached, the first clamping part 10 is operated to be closed with respect to the second clamping part 20, and the pressing part 11 is connected to the first wall part 21 and the second wall. While making it approach between the parts 22, the 1st latching | locking part 12 of the press part 11 is inserted in the groove | channel 24. FIG.
Then, due to the elastic force of the bent portion 30, the first clamping portion 10 moves so as to open with respect to the second clamping portion 20, and the first locking surface 12 a of the first locking portion 12 is in the groove 24. The movement of locking to the locked surface 24 a and opening of the first clamping unit 10 relative to the second clamping unit 20 is restricted.
As a result, the first clamping unit 10 and the second clamping unit 20 are attached to the tube 2 in a state where they are opposed to each other.

(Blocking method)
Next, an operation method of the clamp 1 when closing the flow path of the tube 2 will be described.
First, the operator holds the outer surface 10b of the first clamping unit 10 and the outer surface 20b of the second clamping unit 20, and applies a force so that the first clamping unit 10 and the second clamping unit 20 are close to each other. The first clamping unit 10 performs an operation of closing the second clamping unit 20.
According to this, as shown in FIG. 4, the pressing portion 11 moves downward while being orthogonal to the second clamping portion 20.
And the 1st wall part 21 is pressed and tilted by the 2nd latching | locking part 13 of the press part 11, and the tube 2 is pressed below by the front-end | tip part 11a of the press part 11, and moves below. To contact the contact surface 23 of the second clamping part 20.
Further, the tube 2 is pressed downward by the distal end portion 11 a of the pressing portion 11, so that the tube 2 is sandwiched between the pressing portion 11 and the contact surface 23 from the vertical direction, and the flow path of the tube 2 is closed.
When the flow path of the tube 2 is closed, the inner surface 10 a of the first clamping unit 10 is in contact with the distal end surface 22 b of the second wall portion 22.

(Locking method)
Next, an operation method of the clamp 1 when the second locking portion 13 is locked to the locked surface 24a will be described.
First, the operator applies a force so that the first clamping unit 10 and the second clamping unit 20 are close to each other while gripping the front side of the outer surface 10b of the first clamping unit 10, and the first clamping unit 10. Is closed with respect to the second clamping unit 20.
According to this, as shown in FIG. 5, it bends so that the front end side of the 1st clamping part 10 may move below by using the 2nd wall part 22 as a fulcrum. In addition, since the front end surface of the 1st wall part 21 is not contact | abutting to the inner surface 10a of the 1st clamping part 10, the space where the 1st clamping part 10 bends is formed.

Further, as the first holding part 10 is bent, the pressing part 11 is also tilted rearward, and the position of the second locking part 13 of the pressing part 11 is on the lower side. Therefore, the second locking portion 13 is inserted into the groove 24, and the second locking surface 13a is locked to the locked surface 24a.
Note that the tilting of the pressing portion 11 maintains the closed state of the tube 2 because the distal end portion 11 a of the pressing portion 11 moves to the rear side while sliding on the outer surface of the tube 2.

  As described above, according to the clamp 1 according to the embodiment, even if the posture of the pressing portion 11 to be pressed is orthogonal to the tube 2, the pressing portion 11 is tilted and the second locking portion 13 is locked to the locked surface 24 a. Can be locked. Therefore, in order to lock the second locking portion 13 to the locked surface 24a, it is possible to avoid the operation of pressing the pressing portion 11 orthogonal to the tube 2 to crush and deform the thick portion of the tube 2.

Although the clamp 1 according to the embodiment has been described above, the clamp according to the present invention is not limited to the example described in the embodiment.
For example, as shown in FIG. 6, the protruding amount of the first wall portion 21 and the protruding amount of the second wall portion 22 may be the same. However, when the first wall portion 21 and the second wall portion 22 having the same protruding amount are used, as a configuration for tilting the pressing portion 11 to the first sandwiching portion 10, the rear portion of the pressing portion 11 is used. It is necessary to provide an abutting portion 16 that is thickened inside.
According to the contact portion 16, on the inner surface 10 a of the first sandwiching portion 10, the front side of the pressing portion 11 provided with the contact portion 16 protrudes downward from the rear side of the pressing portion 11. Therefore, when the tube 2 is pressed by the pressing portion 11, the second wall portion 22 abuts against the abutting portion 16, while the first wall portion 21 does not abut against the inner surface 10 a. The first clamping unit 10 can be bent and tilted as a fulcrum.

Moreover, the clamp which concerns on this invention is not limited to the example demonstrated by embodiment regarding the length of the front-back direction of a 1st clamping part and a 2nd clamping part.
As shown in FIG. 7, for example, the first sandwiching portion 10 and the second sandwiching portion 20 include a first extending portion 17 that extends forward from a front end of the first sandwiching portion 10 and the second sandwiching portion 20, and a second sandwiching portion 20. An extending portion 27 may be provided. Or only the 1st clamping part 10 may be provided with the 1st extension part 17c extended ahead from the front end of the 1st clamping part 10, as shown in FIG.
According to the clamps 1 </ b> B and 1 </ b> C of this modification, the part that can be gripped is enlarged forward. Therefore, the 1st clamping part 10 can be bent easily by hold | maintaining the site | part away from the fulcrum (2nd wall part 22) where the 1st clamping part 10 bends.
In addition, regarding the shape of the 1st extension part 17 and 17c and the 2nd extension part 27, like the 1st extension part 17 and the 2nd extension part 27, the 1st clamping part 10 and the 2nd clamping part May be formed so as to be collinear with each other (see FIG. 7), or may be formed to warp upward like the first extending portion 17c (see FIG. 8).

Or the clamp which concerns on this invention is not limited to the example demonstrated in embodiment regarding the shape of the press part of a 1st clamping part, the 1st wall part of a 2nd clamping part, and a 2nd wall part.
For example, as shown in FIG. 9, the second wall portion 22 </ b> D having an inclined surface 29 that is largely rounded on the front side of the upper portion may be used.
According to the clamp 1D of the modified example including the second wall portion 22D, the space between the upper portion of the first wall portion 21 and the upper portion of the second wall portion 22D is widened. Therefore, when the first locking surface 12a of the pressing portion 11 is locked to the locked surface 24a of the first wall portion 21, the pressing portion 11 is interposed between the first wall portion 21 and the second wall portion 22D. Work to enter becomes easy.

DESCRIPTION OF SYMBOLS 1, 1A, 1B, 1C, 1D Clamp 2 Tube 10 1st clamping part 11 Press part 13 2nd latching part 16 Contact part 20 2nd clamping part 21 1st wall part 22, 22D 2nd wall part 23 Contact Surface 24a Locked surface 30 Bent part

Claims (3)

A first sandwiching portion; a second sandwiching portion disposed opposite to the first sandwiching portion; a bent portion connecting the rear end portion of the first sandwiching portion and the rear end portion of the second sandwiching portion; Comprising a tube extending in the front-rear direction on the inner surface of the second sandwiching portion, and a clamp for sandwiching the tube by the first sandwiching portion and the second sandwiching portion,
On the inner surface of the second clamping part, a pair of wall parts composed of a first wall part on the front side and a second wall part on the rear side are projected,
On the inner surface of the first sandwiching part, a pressing part that is freely movable between the pair of wall parts protrudes,
A locking portion that locks in the opening direction with respect to the first wall portion is formed at the front portion of the pressing portion,
When the first clamping part is closed with respect to the second clamping part, the second wall part is in contact with the inner surface of the first clamping part without the first wall part contacting. ,
The first clamping part is bent by further closing the first clamping part where the second wall part is in contact with the inner surface of the first clamping part, and the pressing part tilts with the second wall part as a fulcrum. Clamp characterized by that.   In the pair of wall portions, the protruding amount of the second wall portion on the rear side is larger than the protruding amount of the first wall portion, and the first holding portion is closed with respect to the second holding portion. 2. The clamp according to claim 1, wherein the second wall portion having a larger protruding amount than the first wall portion abuts against an inner surface of the first holding portion.   The inner surface of the first sandwiching portion protrudes inward on the rear side of the pressing portion rather than the front side of the pressing portion, and when the first sandwiching portion is closed with respect to the second sandwiching portion, 2. The clamp according to claim 1, wherein the second wall portion is in contact with an inner surface of the first clamping portion and an inner surface of the rear side of the pressing portion.

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