WO2023149456A1

WO2023149456A1 - Clamp and transfusion set

Info

Publication number: WO2023149456A1
Application number: PCT/JP2023/003170
Authority: WO
Inventors: 明彦古屋
Original assignee: 株式会社トライテック
Priority date: 2022-02-04
Filing date: 2023-02-01
Publication date: 2023-08-10
Also published as: JP2023114208A

Abstract

[Problem] To provide a clamp enabling fine adjustment of the flow rate even by hand by employing a manual configuration, while taking advantage of the mechanism of narrowing the flow path by bending a tube into a dogleg shape and making the angle in the dogleg shape acute. [Solution] A main part 3 comprises: a leaf spring-shaped main part 3 bent to form a pair of opposing parts 9, 15, with a middle part 5 in the length direction as the flexural center X; and a run-out window 7 formed in the middle part 5 across the flexural center X. A tube T is set along the inner bend surface of the main part 3 to bend the main part 3. In a water stopping state, the folding center of the tube T passes through the run-out window 7 and outwardly runs out. The flexure of the main part 3 can be adjusted by turning and screwing a screw part 25 into a nut 19 of side arms 21, 21 rotatably attached. The length of the distance in the circumferential direction in which a head part 25b rotates is made significantly longer than the distance along which a conventional roller member moves even with the same flow rate change amount, and the flow rate is finely controlled with good controllability.

Description

Clemme and infusion set

The present invention relates to a clamp and an infusion set with it attached to a tube.

Conventionally, a clamp has been used to control the infusion by gravity. This clamp adjusts the degree of pressure on the tube while manually moving a roller-like part, and narrows the tube flow path to adjust the flow rate.
Therefore, the moving range of the roller-like parts is short, and even a skilled person finds it difficult to perform minute movements, so it is difficult to adjust the flow rate with high accuracy.

JP 2020-191958 A

On the other hand, in Patent Document 1, we previously proposed an electric clamp that can be configured with a size and weight that can be handled in the same way as a manual clamp while configuring the part responsible for opening and closing the tube electrically.
In this electric crimp, a pair of tube clamps are used to clamp the tube while it is bent in a "<" shape. Accuracy of flow control is generally higher.

However, in the field, there is still a high demand for manual and disposable equipment.
The present invention has been made to solve the above problems, and utilizes a mechanism that narrows the tube flow path by bending the tube into a "<" shape and sharpening the "<" shape. It is also an object of the present invention to provide a new and useful crimp that enables fine adjustment of the flow rate even though it is manual by adopting a manual specification.
Another object of the present invention is to provide an infusion set in which the clamp is attached to a tube.

In order to achieve the above object, the invention of claim 1 provides a leaf spring-shaped main portion that is bent so as to form a pair of opposing portions with a longitudinally intermediate portion as a bending center, and and a setting portion that sets the tube along the bending inner surface of the main portion with the escape window in between, and the tube is bent into a “<” shape by bending the main portion. a tube set structure that allows the center of the fold to protrude outward from the relief window when the tube is folded into two; adjusting means for adjusting the gap between the one facing portion and the pressing portion; and fixing means for releasably fixing the gap between the one facing portion and the pressing portion in a minimum state; A crimp characterized in that the means and said fixing means are realized by manual operation.

According to a second aspect of the invention, there is provided the crimp according to the first aspect, wherein a pair of side arms are rotatably connected from both sides in the width direction of one opposing portion, and a pressing portion supported by the pair of side arms. and a threaded portion that is threadedly engaged with the nut portion so as to be able to advance and retreat, the other opposing portion is sandwiched between the nut portion and the one opposing portion, and the tip surface of the threaded portion is the other The bending means and the adjusting means are realized by pressing the opposing portions of the crimp.

The invention according to claim 3 is the clamp according to claim 2, wherein posture guide walls for the screw shaft are raised on both sides in the length direction and on the escape window side at the end of the other opposing portion, and the posture guide wall on the escape window side rises. This cremme is characterized in that the posture of the wall is regulated against the repulsive force of the spring of the main part.

The invention of claim 4 is the crimp according to

claim

2 or 3, wherein a plurality of support points for a pair of side arms are provided on both sides in the width direction of one opposing portion, and the bending range angle of the tube can be arbitrarily selected. It is a cremme characterized by being able to adjust the wideness and narrowness of.

According to a fifth aspect of the present invention, there is provided a crimp according to any one of the second to fourth aspects, in which an indicator corresponding to the flow rate is displayed on the side arm, and the flow rate is determined by the positional relationship between the other facing portion and the indicator. This cremme is characterized by being able to be visually measured.

The invention of claim 6 is characterized in that, in the crimp according to any one of claims 1 to 5, the fixing means are constituted by locking structures respectively formed on both ends in the length direction of the main portion. It is a cremme to do.

The invention of claim 7 is the creme according to any one of claims 1 to 6, characterized in that it is composed of a resin molded product.

The invention of claim 8 is an infusion set in which the clamp described in any one of claims 1 to 7 is attached to a tube.

The clamp of the present invention allows fine adjustment while manually adjusting the flow rate. In addition, the flow rate can be adjusted without applying a load to the tube as with the existing crimp, and water stoppage can be completely realized.
Since the crimp of the present invention can be manufactured as a resin molded product, it can be attached to a tube and provided as a disposable infusion set.

It is the perspective view seen from two directions of the clamp (screw part omission) which concerns on embodiment of this invention. 2 is a perspective view of the main portion of the clamp of FIG. 1 as seen from two directions; FIG. FIG. 2 is a perspective view of a pair of side arms and a nut portion of the crimp of FIG. 1 as seen from two directions; 1. It is a six-sided view of the finished product which added the screw part to the clamp of FIG. 1, and a side view of a main part. 5A and 5B are two types of side views showing a state in which the main portion of the crimp of FIG. 4 is bent; FIG. 5 is a side view and a front view of the main part of the crimp of FIG. 4 in a bent state; 5A and 5B are a side view and a plan view showing a state in which a tube is set in the crimp of FIG. 4; FIG. 8 is a side view of the crimp of FIG. 7 in a state where the main portion is bent for water stoppage; FIG. 8 is a side view of the crimp of FIG. 7 with the main portion bent for flow rate control; FIG. 10 is a side view of the side arm of FIG. 9 with scale markings; 6 is a side view corresponding to FIG. 5 when the attachment position of the side arm to the main portion is changed with respect to the clamp of FIG. 4; FIG.

A crimp 1 according to an embodiment of the present invention will be described with reference to the drawings.
The crimp 1 is attached to a flexible tube T in the same manner as existing crimps, and the tube T is opened and closed.
The clamp 1 is a resin molded product, and as shown in FIGS. 1 to 6, the clamp 1 has a leaf spring-like main portion 3 . An intermediate portion 5 of the main portion 3 is in the form of a rectangular thin plate. The four corners are rounded to form an R-curved surface. The direction along the long side edge of the intermediate portion 5 is treated as the length direction, and the direction along the short side edge is treated as the width direction. An oval through hole is formed as an escape window 7 in the central portion of the intermediate portion 5 . The escape hole 7 extends along the length direction of the intermediate portion 5 .

Opposing

portions

9 and 15 are connected to both ends of the intermediate portion 5 in the longitudinal direction. The

opposing portions

9 and 15 have

opposing surface portions

9a and 15a that are flush with the intermediate portion 5 and extend outward in the longitudinal direction of the intermediate portion 5, respectively. 9a-intermediate portion 5-facing surface portion 15a. However, the dimensions in the width direction of the

opposing surface portions

9a and 15a are short, and both edges in the width direction are evenly inward of both edges in the width direction of the intermediate portion 5 along the center line common to the intermediate portion 5. retreating towards

On the facing portion 9 side, a pair of

set walls

9b, 9b rises from both sides in the width direction of the facing surface portion 9a on the same side. ing. This engaging projection 9c extends from the base end to the upper end of the set wall 9b. A pair of

locking ridges

9c, 9c face each other on the inner surface side of the

set walls

9b, 9b, and three pairs of

locking ridges

9c, 9c face each other with a space between the

set walls

9b, 9b. ing.

In addition, on the front end side in the length direction of the opposing surface portion 9a, a pair of

pinching pieces

11a, 11a are continuously provided so that one surface thereof covers the outside of the

set walls

9b, 9b. The pinching piece 11a extends upward beyond the upper end of the set wall 9b, and one side is slanted. there is A locking claw 11b is projected from the tip of the pinching piece 11a, and a pair of

locking claws

11b, 11b face each other on the inner surface side of the

pinching pieces

11a, 11a. The locking claw 11b is triangular in cross section and has an arrowhead shape with an acute angle on the upper end side.

As described above, the set wall 9b and the pinching piece 11a are raised on one side of the facing surface portion 9a, and the bearing 13 is provided on the other side. The bearing 13 is provided with an insertion opening 13a. A pair of

insertion openings

13a, 13a are arranged side by side in the width direction of the facing surface portion 9a, and face the tip direction of the facing surface portion 9a. Two pairs of

bearings

13, 13 are provided at intervals in the longitudinal direction of the facing surface portion 9a.

On the side of the facing portion 15, similarly to the facing portion 9, a set wall 15b and a locking projection 15c are continuously provided on the facing surface portion 15a. The set wall 15b rises on the same side as the set wall 9b, and these constitute a set portion. On the side where the set wall 9b or the like rises, the set wall 9b on the facing portion 9 side, the locking projection 9c, the set wall 15b on the facing portion 15 side, and the locking projection 15c are integrated with the intermediate portion 5 to set the tube. structure is constructed.

Further, the outer surface of the set wall 15b on the tip side is recessed in a rectangular shape, and a locking step 11c is formed between it and the periphery thereof. The engaging step 11c is in the shape of "U", and the upper end side of the set wall 15b is the intermediate portion of the "U". A pair of locking

steps

11c, 11c face the outer surfaces of the set

walls

15b, 15b.
The clamping piece 11a, the locking claw 11b, and the locking step 11c constitute the fixing means 11. As shown in FIG.
As described above, when the main portion 3 is bent, the pinching piece 11a and the locking step 11c approach each other. The upper end faces of the

set walls

9b, 9b and the set

walls

15b, 15b abut against each other while being locked by the locking steps 11c, 11c. This contact state is fixed by the locking structure.

As described above, the set wall 15b rises on one side of the facing surface portion 15a, but the set wall 15b continues on the other side, and the other side has a longitudinal posture guide wall 17a. standing up as However, the corner portion on the intermediate portion 5 side is missing and inclined. The length direction

posture guide walls

17a, 17a extend in parallel, and the middle thereof is closed by the width direction posture guide wall 17b so as to partition the length direction. Width direction

attitude guide walls

17b, 17b are provided at intervals, one of which is located on the inclined side. The attitude guide wall 17 is formed of a square frame composed of the length direction attitude guide wall 17a and the width direction attitude guide wall 17b.

Reference numeral 19 indicates a cylindrical nut portion. The nut portion 19 is connected to one end of a pair of

side arms

21, 21 while being sandwiched therebetween. The arm main body 21a of the side arm 21 is formed in the shape of an elongated strip, and the plate surfaces of the arm

main bodies

21a, 21a face each other. The arm body 21a has an L shape with a slightly acute angle at one end in the length direction, and the nut portion 19 is continuously provided on the tip side of the L-shaped protruding piece 21e. Therefore, the axial direction of the nut portion 19 intersects with the lengthwise direction of the arm body 21a.
The arm main body 21a is vertically bent at the intermediate portion to form a step 21b, and the widthwise interval between the arm

main bodies

21a, 21a is widened on the far side from the nut portion 19 side. Due to the step 21b, the outer surface of the arm body 21a is an L-shaped recessed surface, and a rectangular plate-like reinforcing portion 21c is fitted in the recessed surface in a rib-like manner.

The step 21b is formed at a position about 1/3 from the nut portion 19 side in the length direction of the arm body 21a.

Strips

21d, 21d are provided. The locking piece 21d is L-shaped, protrudes from the thickness of the arm body 21a in a convex shape, and bends at its tip end to protrude inward in the width direction of the arm body 21a. The locking piece 21d is provided on the side opposite to the mounting side of the nut portion 19. As shown in FIG.

A cylindrical shaft 23 is provided between the ends of the

arm bodies

21a, 21a on the other lengthwise end side. This shaft 23 is perpendicular to the lengthwise direction of the

arm bodies

21a, 21a, and the intermediate shaft 23a has a smaller diameter than both side shafts 23b.
The intermediate shaft 23a is inserted into the holes of the

bearings

13, 13 through the

insertion openings

13a, 13a and connected to the main portion 3 side, so that the

side arms

21, 21 are rotatable with respect to the opposing portion 9. It's becoming Therefore, the

side arms

21, 21 and the nut portion 19 swing together like a swing. However, in the state before use, the intermediate portion 5 of the main portion 3 is flat, and the intermediate portion 5 is sandwiched between the locking

pieces

21d, 21d on the arm

main bodies

21a, 21a side, and the nut portion 19 is mounted on the side where the nut portion 19 is attached. The longitudinal

posture guide walls

17a, 17a are sandwiched from the outside on the base end side of the L-shape of the

side arms

21, 21, and the postures of the

side arms

21, 21 are held in a non-rotatably fallen state with respect to the main portion 3. there is

Reference numeral 25 indicates a threaded portion. A screw shaft 25 a of the threaded portion 25 is screwed into the nut portion 19 . The enlarged diameter head portion 25b serving as the operating portion is positioned away from the shaft 23 serving as the rotation center of the side arm 21. As shown in FIG.

The clamp 1 is constructed as described above, and the intermediate portion 5 of the main portion 3 is the most bendable portion. , the bending center X comes to the intermediate portion 5 . The relief window 7 straddles this bending center X. Since the screw shaft 25a and the opposing surface portion 9a can be orthogonal or nearly crossed, the pushing direction of the screw shaft 25a is orthogonal to the contact surfaces of the opposing

portions

9 and 15. Folded bending can also be easily reproduced.
Also, the posture holding of the

side arms

21, 21 is released, and they become rotatable.
When the bent main part 3 is released, the repulsive force of the plate spring tries to return it to a flat shape. is inserted into the attitude guide wall 17, the return is prevented and the bent attitude is maintained.
When the facing

portions

9 and 15 are overlapped and the locking

claws

11b and 11b are locked and fixed by the locking steps 11c and 11c, as shown in FIG.

In a state where the tube T is straightened, it is sandwiched between the locking

projections

9c, 9c on the opposing portion 9 side and between the locking

projections

15c, 15c on the opposing portion 15 side, thereby achieving the structure shown in FIG. Thus, the tube T can be set along the main portion 3 .
The tube T is slightly pressed between the opposing locking

ridges

15c, 15c, but the required flow path is secured. On the other hand, even if the tube T is pulled in the sliding direction, since there are a plurality of locking portions along the sliding direction, the sliding resistance is increased, making it difficult to slide. When the tube T is set, the entire peripheral surface of the tube T is exposed at the relief window 7 of the intermediate portion 5 .

When the tube T is set and the main portion 3 is bent as shown in FIG. 6, the tube T is bent at the sharpest angle. Since the folding center Y of the tube T can pass through the relief window 7 and protrude, it is possible to bend the tube T tightly as shown in FIG. The arm body 21a of the side arm 21 and the nut portion 19 are L-shaped with a slightly acute angle.
When the main portion 3 is bent as shown in FIG. 9 and the tip portion of the screw shaft 25a is inserted into the attitude guide wall 17, the screw shaft 25a of the screw portion 25 from the nut portion 19 is displaced. Since the tip part pushes, the tube T is bent in a "<" shape along the main part 3. - 特許庁By adjusting the degree of elongation of the screw shaft 25a, the bending angle of the main portion 3 is changed to maintain the "<" shape while maintaining the "<" shape. You can adjust the bending angle. The bending angle of the tube T and the flow rate of the tube T are correlated.

When the head 25b of the threaded portion 25 is turned by hand to thread the threaded shaft 25a, the tip of the threaded shaft 25a pushes the facing surface portion 15a with which the threaded shaft 25a abuts. Following this, the included angle of the letter "<" of the tube T becomes smaller and sharper. When the screw shaft 25a is screwed back, the bending of the main portion 3 is loosened, and the included angle of the "<" shape of the tube T is increased accordingly.

The clamp 1 adjusts the flow rate of the tube T by turning the head 25b of the threaded portion 25 by hand. On the other hand, the distance in the circumferential direction that the head 25b rotates is remarkably long, so that the operability is good and the flow rate can be precisely controlled. Two pairs of

bearings

13, 13 are provided, and as shown in FIG. can be narrowed. That is, it is possible to select a wide or narrow folding angle range of the tube T. FIG. If the desired flow rate is large, the one close to the outside of the facing portion 9 will be selected.

Since it can be bent with a much smaller force than pressing, this clamp 1 can be completely closed to achieve a water stop while having a simple structure. Moreover, this crimp 1 can be configured with the same size and weight as the conventional crimp, and the tube T is not loaded.
Therefore, it can be handled in the same way as the existing clamp.
The clamp 1 is a disposable resin-molded product, and can be provided as an infusion set by attaching a tube T in advance.

In FIG. 10, the side arm 21 shows a plurality of scales serving as rough guides for the flow rate and flow rates (numerical values) corresponding to the scales. By turning the screw portion 25 so that the upper end surface 15d of the facing portion 15 overlaps with the predetermined scale, the flow rate can be roughly adjusted by a rough operation.

Although the embodiments of the present invention have been described above, the specific configuration of the present invention is not limited to the above-described embodiments, and the present invention may be modified without departing from the gist of the present invention. Included in the invention.
For example, the specific structure can be changed as long as a predetermined movement can be realized in the tube.
By adjusting the pitch of the screw and the diameter of the head 25b, the operability for the desired flow rate can be optimized while ensuring precise flow control.

DESCRIPTION OF SYMBOLS 1... Clamp 3... Main part 5... Intermediate part 7... Escape window 9... Opposing part 9a... Opposing surface part
9b...Set wall 9c...Locking projection 11...Fixing means
11a... Clipping piece 11b... Locking claw 11c... Locking step 13... Bearing 13a... Insertion hole 15... Opposing part 15a... Opposing surface part 15b... Set wall 15c... Locking projection 15d... Upper end surface 17... Posture guide wall 17a... Length direction posture guide wall 17b Width direction posture guide wall 19 Nut portion 21 Side arm

21a Arm body 21b Step

21c Reinforcing portion

21d Locking piece

21e Protruding piece 23 Shaft
23a...Intermediate shaft 23b...Both side shafts 25...Screw part
25a... Screw shaft 25b... Head T... Tube X... Bending center Y... Folding center

Claims

A plate spring-shaped main portion that is bent so as to form a pair of opposing portions with a lengthwise intermediate portion as a bending center, an escape window formed in the intermediate portion straddling the bending center, and the escape window sandwiched therebetween. is configured by a set portion for setting the tube along the bending inner surface of the main portion, and when the tube is bent into a "<" shape by bending the main portion, the center of the fold is outward from the escape window With a tube set structure that can escape and protrude,
Bending means for bending the other facing portion sandwiched between the holding portions connected to the one facing portion;
adjusting means for adjusting the distance between the one facing portion and the pressing portion;
fixing means for releasably fixing the gap between the one facing portion and the pressing portion in a minimum state;
A crimp characterized in that said bending means, said adjusting means and said fixing means are realized by manual operation.
In the creme according to claim 1,
A pair of side arms rotatably connected from both sides in the width direction of one opposing portion, a nut portion supported by the pair of side arms to form a holding portion, and a nut portion that is screwed forward and backward. The bending means and the adjusting means are realized by sandwiching the other opposing portion between the nut portion and the one opposing portion and pushing the other opposing portion with the tip surface of the threaded portion. The cremme characterized by being done.
In the creme according to claim 2,
Posture guide walls for the screw shaft rise on both sides in the length direction and on the escape window side at the end of the other opposing portion, and the posture guide wall on the escape window side resists the spring repulsive force of the main portion and regulates the posture. Clemme, characterized in that
In the cremme according to claim 2 or 3,
A crimp characterized in that a plurality of support points for a pair of side arms are provided on both sides in the width direction of one facing portion, and the width of the folding range angle of the tube can be adjusted by arbitrary selection.
In the cremme according to any one of claims 2 to 4,
An index corresponding to the flow rate is displayed on the side arm, and the flow rate can be visually measured based on the positional relationship between the other facing portion and the index.
In the cremme according to any one of claims 1 to 5,
A crimp, characterized in that the fixing means is constituted by locking structures respectively formed on both ends in the longitudinal direction of the main portion.
In the cremme according to any one of claims 1 to 6,
A creme characterized by being composed of a resin molded product.
An infusion set in which the clamp according to any one of claims 1 to 7 is attached to a tube.