JP6706480B2 - Infusion tube winding device and infusion device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an infusion tube winding device and an infusion device used in an infusion device for administering various nutrients, medical liquids such as medicines, and transfusing blood into the body of a patient.

Generally, in an infusion device, one end of an infusion tube is connected to an infusion bag hung on an infusion table, a needle provided on the other end of the infusion tube is inserted into a patient's blood vessel, etc. It is supposed to be instilled into the body.

The infusion tube which constitutes the conventional infusion device is lengthened in advance for convenience of inspection or the like. Therefore, the liquid transfusing tube is too long to be entangled in a complicated manner except for the inspection. Also, if an unexpected external force is exerted on the infusion tube by the patient carelessly leaving the infusion table, the needle inserted into the patient's blood vessel will come out of the blood vessel, or the blood vessel or tissue around the needle will be damaged. There was a fear.

In the infusion tube holder described in Patent Document 1, by attaching a stopper pedestal having several tube stoppers to the drip table strut, the long middle portion of the infusion tube is used as the tube stopper of the stopper pedestal. It is proposed to hold the infusion tube to a proper length by stopping it.

Japanese Utility Model No. 7-33348

Even with the infusion solution holder described in Patent Document 1, the infusion tube can be stopped only at the middle portion of the infusion tube that is fixed to the tube stopper of the stopper pedestal.

Therefore, the extra long part of the middle part of the infusion tube is slackened by hanging around the drip table column to which the stopper holder is attached, or it hangs down to solve the complicated situation. Absent.

In addition, if an unexpected external force is applied to the infusion tube while the middle part of the infusion tube is stopped by the tube stopper of the stopper holder or is held by being hooked around the drip table column, the unexpected external force may The infusion tube cannot be pulled out freely, and a buffer function for preventing external force from reaching the needle on the other end side of the infusion tube cannot be expected.

An object of the present invention is to provide an infusion tube winding device and an infusion device that allow the infusion tube to be handled in an appropriate length and buffer an unexpected external force acting on the infusion tube.

The invention according to claim 1 is an infusion solution in which a winding body capable of winding and drawing out an infusion tube is built in a winding case and rotatably pivotally attached to a support shaft provided in the winding case. In the tube winding device, the winding body has a middle height portion having a bearing hole fitted to a support shaft provided in the winding case, and a tube winding portion around the middle height portion, The middle height portion has a stepped shape with a certain height in the axial direction of the bearing hole with respect to the tube winding portion, and passes through the bearing hole and two positions that are diametrically opposed to each other on the circular outer circumference of the middle height portion. It has a tube-loading groove with a constant depth, and the middle part of the infusion tube is fitted into the tube-loading groove of the middle-high part and is loaded in an S-shape. The one end side portion and the other end side portion of the infusion tube extending from the two-position tube loading groove portion to the tube winding portion side are along the circular outer periphery of the middle height portion on the tube winding portion, and The wound state of the infusion tube, which is wound so as to form a circular spiral lined up next to each other, is loaded into the tube loading groove provided in the middle height portion, and is wound on the tube winding section, is provided in the winding case. The infusion tube is covered and held, and both the one end side and the other end side of the infusion tube are simultaneously wound by the winding direction rotation of the winding body, or simultaneously withdrawn by the winding direction rotation of the winding body. It is the one.

In the invention according to claim 2, in the invention according to claim 1, the tube loading groove portion provided in the middle height portion of the winding body has a groove depth x that is shallower than an outer diameter d of the infusion tube, and a groove width y. The cross section of the infusion tube, which is longer than the outer diameter d of the infusion tube, is loaded so as to be pushed into the tube loading groove and is held in the loaded state by the lid, has a major axis in the groove width direction of the tube loading groove. It is an oval shape .

In the invention according to claim 3, in the invention according to claim 1 or 2, the winding body may have a radius of curvature of an infusion tube wound around the winding body, and the infusion tube may be broken. It is set to be larger than the minimum critical bending radius.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the winding body constantly applies a winding force for winding the infusion tube around the winding body to the infusion tube. It has a force imparting means.

In the invention according to claim 5, in the invention according to claim 4, further, the winding body is provided with a winding force applied by a winding force applying means in a state where no external force is applied to the infusion tube. It has a winding lock means for preventing winding.

According to a sixth aspect of the invention, in the invention according to the fifth aspect, further, the winding body is wound by the winding force applying means in a state in which the external pulling force applied to the infusion tube is released. The infusion tube is wound by a certain length by a force, and thereafter, winding lock means for preventing the infusion tube from being wound by the winding force applied by the winding force applying means is provided.

A seventh aspect of the present invention is an infusion device including the infusion tube winding device according to any one of the first to sixth aspects.

(Claims 1 and 2 )
(a) The winding body of the winding device enables the infusion tube to be wound and pulled out. Therefore, the length of the infusion tube that has been lengthened in advance for convenience of inspection is tied up and tidy up by the winding body at the time of other than the inspection, and it is pulled out from the winding body at the time of inspection and has a convenient length. Can be used in. That is, the infusion tube can be handled with an appropriate length.

When an unexpected external force acts on the infusion tube due to the patient inadvertently leaving the infusion table, the unexpected external force pulls out the infusion tube freely from the winding body, and the external force is applied to the needle on the other end of the infusion tube. Avoid overruns. There is no risk that the needle inserted into the blood vessel of the patient will come out of the blood vessel or the blood vessel or tissue around the needle will be damaged. When the unexpected external force disappears, the portion of the infusion tube pulled out by the external force is rewound around the winding body. That is, the unexpected external force acting on the infusion tube can be buffered.

(b) The winding body enables both the one end side portion and the other end side portion of the infusion tube to be rolled up at the same time or pulled out at the same time. That is, the winding body is capable of simultaneously winding both end portions of the infusion tube by rotating in the winding direction. Further, the winding body can simultaneously withdraw both end portions of the infusion tube by rotating in the withdrawal direction.

(Claim 3)
(c) In the winding body, the radius of curvature of the infusion tube wound around the winding body is set to be larger than the minimum critical bending radius at which the infusion tube may be broken. Therefore, in the bent state in which the infusion tube is wound around the winding body, there is no possibility of breaking the infusion tube to block the passage of the infusion tube, and it is possible to always maintain stable liquid delivery performance.

(Claim 4)
(d) The winding body has a winding force applying means that constantly applies a winding force for winding the infusion tube around the winding body to the winding tube. Therefore, the infusion tube is always biased in the winding direction by the winding force of the winding force applying means. The liquid transfusing tube is pulled out by the external pulling force applied by the user so as to exceed the winding force, and when the external pulling force is released, the infusion tube is ready to be wound by the winding force.

(Claim 5)
(e) The winding body has a winding lock means for preventing winding of the infusion tube by the winding force applied by the winding force applying means under the condition that the pulling external force is not applied to the infusion tube.

(Claim 6)
(f) The winding body winds the infusion tube by a certain length by the winding force applied by the winding force imparting means in a state where the pull-out external force applied to the infusion tube is released, and then the winding body It has a winding lock means for preventing winding of the infusion tube by the winding force applied by the force applying means.

(Claim 7)
(g) In the infusion device, the above (a) to (f) can be realized.

FIG. 1 is a schematic diagram showing an application example of an infusion device. FIG. 2 is a schematic view showing an embodiment of a device for winding an infusion tube. FIG. 3 is a schematic view showing a cross section of the infusion tube loaded in the tube loading groove portion of the winding body. FIG. 4 is a schematic diagram showing another example of the infusion tube winding device. FIG. 5 is a schematic view showing the winding force applying means. FIG. 6 is an exploded perspective view of the infusion tube winding device. FIG. 7 is a schematic view showing the winding lock means. FIG. 8 is a schematic view showing a modified example of the winding body. FIG. 9: is a schematic diagram which shows the modification of the tube loading structure with which a winding body is equipped.

In the infusion device 100 shown in FIG. 1, one end of an infusion tube 101 is connected to an infusion bag 103 hung on an infusion table 102, and a needle 104 provided on the other end of the infusion tube 101 is inserted into a blood vessel or the like of a patient M. Then, the infusion solution in the infusion solution bag 103 is delivered to the body of the patient M by drip or the like. Here, the infusion device 100 includes the winding device 10 for the infusion tube 101.

The infusion tube 101 may be made of any material and size, but may be made of polybutadiene having an outer diameter of 4.5 mm and an inner diameter of 3.2 mm.

As shown in FIGS. 2 and 6, the winding device 10 incorporates a disk-shaped winding body 30 inside a winding case 20, and the winding force is applied to the winding body 30 and a winding lock. Means 50 are additionally provided.

The winding case 20 has a case body 21, a frame body 22 fixed to the case body 21, and a lid body 23 (composed of a lid frame 23A and a lid plate 23B) hinged to the frame body 22. Composed.

The winding body 30 has a bearing hole 31 fitted to the outer periphery of a support shaft 24 provided in the center of the case body 21, and a collar 33 attached to the end face of the support shaft 24 with a set screw 32 for supporting the support shaft 24. It is prevented from coming off from 24 and is pivotally attached to the support shaft 24. By fixing the frame body 22 to the front side outer peripheral portion of the case main body 21 in which the winding body 30 is pivotally attached to the support shaft 24, the case main body 21 and the frame body 22 are arranged such that the outer peripheral portion of the winding body 30 is located on the front side. The winding body 30 is rotatably held by sandwiching the winding body 30 from both sides.

The winding body 30 has a middle portion on the front side that is a circular middle portion 34 in a front view, and a periphery of the middle portion 34 is a tube winding portion 35. The middle height portion 34 has a high stepped shape in the axial direction of the bearing hole 31 with respect to the plane of the tube winding portion 35 by a certain height (generally equivalent to the outer diameter of the liquid transfusing tube 101), and has a diameter on the outer circumference of the middle height portion 34. It is provided with a tube loading groove 34A having an S-shaped constant depth (generally equivalent to the outer diameter of the liquid transfusing tube 101) passing through the two opposing positions and the bearing hole 31.

The transfusion tube 101 is inserted into the tube loading groove 34A of the middle height portion 34 with respect to the winding body 30 so as to have an S-shape, and the infusion tube 101 is located at two positions on the outer circumference of the middle height portion 34 which are opposed to each other in diameter. The one end side portion and the other end side portion of the infusion tube 101 extending from the tube loading groove portion 34A to the tube winding portion 35 side are arranged along the outer periphery of the middle height portion 34 on the tube winding portion 35 and aligned with each other. It is wound so as to form two spiral spirals. One end of the infusion tube 101 is drawn upward through a pair of left and right guide rollers 25A and 25B provided on the upper portion of the frame 22 of the winding case 20, and the other end of the infusion tube 101 is the winding case. It is pulled out downward through a pair of left and right guide rollers 26A and 26B provided at the bottom of the frame body 22 of 20.

In the winding body 30, the infusion state of the infusion tube 101, which is loaded in the tube loading groove portion 34A of the middle height portion 34 and wound on the tube winding portion 35, is covered with respect to the case body 21 and the frame body 22. When the body 23 is closed, it is covered and held by the lid body 23. The closed lid 23 is rotated between the winding body 30 and the winding/drawing of the infusion tube 101 by interposing a small gap between the lid body 23 and the above-mentioned infusion tube 101 wound around the winding body 30. Does not give resistance to.

As a result, the winding body 30 enables the infusion tube 101 to be wound and pulled out, and by rotating the winding body 30 in the winding direction, both the one end side portion and the other end side portion of the infusion tube 101 are simultaneously wound and wound. By rotating the collecting body 30 in the pull-out direction (rotation in the opposite direction to the winding direction), both the one end side portion and the other end side portion of the liquid transfusing tube 101 can be pulled out at the same time.

In the winding device 10, FIG. 2(A) shows the liquid transfusing tube 101 at a stage before being wound on the winding body 30, and FIG. 2(B) shows the liquid transfusing tube 101 wound on the winding body 30. Shows. The winding device 10 may have the infusion tube 101 wound on the winding body 3 at the factory production stage, or may be wound by loading the infusion tube 101 on the winding body 30 at the use stage in the medical field. good.

Here, the winding body 30 has a radius of curvature r of the infusion tube 101 wound around the winding body 30 and a minimum critical bending radius KR (for example, 15 mm, preferably 15 mm) at which the infusion tube 101 may be broken. It is set larger than (~25mm) (r>R). In the present embodiment, the infusion tube 101 has a radius of curvature r (FIG. 2(B)) set to a minimum value rmin at a portion of the winding body 30 which is loaded in the S-shaped tube loading groove portion 34A, and the tube loading groove portion 34A. The radius of curvature rmin is set to be larger than the minimum critical bending radius KR (rmin>R). By setting the radius of curvature rmin of the tube loading groove 34A to a value as close as possible to the minimum critical bending radius KR, while ensuring stable liquid delivery by the infusion tube 101, the winding body 30 and the winding device 10 can be secured. Achieved downsizing (smaller diameter).

The tube loading groove 34A shown in FIG. 3A has a groove width w equal to the outer diameter d of the infusion tube 101, but the tube loading groove 34A shown in FIG. 3B has a groove depth x. Was made shallower than the outer diameter d of the infusion tube 101, and the groove width y was made longer than the outer diameter d of the infusion tube 101. According to the tube loading groove portion 34A of FIG. 3B, the cross section of the infusion tube 101 that is loaded so as to be pushed into the tube loading groove portion 34A and is held in the loaded state by the lid 23 has the tube loading groove portion 34A. The elliptical shape having the major axis in the groove width direction makes it possible to further reduce the minimum critical bending radius KR that causes the infusion tube 101 to be broken, and to promote miniaturization of the winding body 30 and thus the winding device 10.

The winding body 30 shown in FIGS. 8(A) and 8(B) has a tube loading groove portion 34A provided in the middle height portion 34 in which the groove depth x (x<d) and groove width shown in FIG. 3(B). When y (y>d) is formed, a pressing plate 36 for additionally holding the elliptical cross section of the infusion tube 101 loaded so as to be pushed into the tube loading groove 34A is additionally provided. As shown in FIGS. 9(A) to 9(B), the pressing plate 36 is fitted and attached so as to be in close contact with the surface of the middle-high portion 34 of the winding body 30. The locking claws 36K provided at a plurality of positions on the mating surface of the pressing plate 36 with respect to the surface of the middle height portion 34 are disengaged from the locking recesses 34K provided at the corresponding positions on the surface of the middle height portion 34. The pressing plate 36 may be hinged to the middle height portion 34 of the winding body 30 and may be opened and closed between a position in which it closely contacts the surface of the middle height portion 34 and a position separated from the surface of the middle height portion 34.

The pressing plate 36 shown in FIG. 9(C) includes an S-shaped tube fitting groove portion 36A that matches the S-shape of the tube loading groove portion 34A included in the middle height portion 34, on the mating surface with respect to the surface of the middle height portion 34. .. Further, the groove bottom shapes of the tube loading groove 34A and the tube fitting groove 36A are elliptical. As a result, the infusion tube 101 clamped by the tube loading groove portion 34A of the middle height portion 34 and the tube fitting groove portion 36A of the pressing plate 36 and loaded in the both groove portions 34A, 36A follows their elliptical groove bottoms. It is given and retained an elliptical cross section.

In the winding body 30 shown in FIG. 9D, the groove section of the tubular loading groove section 34A provided in the middle-high section 34 has an elliptical cross section, and the narrow width section located in the minor axis direction of the elliptical groove section ( An S-shaped tube loading port 34</b>B that opens to the surface of the middle-high portion 34 is provided in (smaller than the outer diameter of the infusion tube 101 ). As a result, the infusion tube 101 is pushed from the tube loading port 34B and loaded into the tube loading groove 34A, and then is surrounded and held by the elliptical groove cross section of the tube loading groove 34A, and is given an elliptical cross section.

In the winding body 30 shown in FIG. 4, one end side portion and the other end side portion of the liquid transfusing tube 101 are arranged along the outer periphery of the middle-high portion 34 on the plane of the tube winding portion 35, and are aligned with each other. In order to form a spiral spiral, the upper surface of the tube winding section 35 is preliminarily formed with two spiral tube seating recesses 35A. The tube seat recess 35A is formed as a shallow arc recess that allows only a portion of the transfusion tube 101 in the circumferential direction to be seated.

As shown in FIGS. 5 and 6, the winding body 30 has a winding force applying means 40 that constantly applies a winding force for winding the infusion tube 101 to the winding body 30 to the infusion tube 101.

The winding force imparting means 40 is provided with a mainspring spring case 41 fixed to the back surface of the winding body 30 arranged around the support shaft 24 of the winding case 20, and inside the mainspring spring case 41, a spiral spring (spiral spring). Spring 42). The mainspring spring 42 is provided so that the inner peripheral end thereof is locked to the support shaft 24 of the winding case 20 and the outer peripheral end thereof is locked to the case inner peripheral portion of the mainspring spring case 41. The mainspring spring 42 is fixed to the winding body 30 when the external force is applied to the infusion tube 101 wound around the winding body 30 and the winding body 30 is rotated in the drawing direction. It is wound up through and stores elastic energy. The winding force applying means 40 uses the biasing force resulting from the elastic energy stored in the mainspring spring 42 as the winding direction rotational force (referred to as winding force) for the winding body 30 and is wound around the winding body 30. This winding force is constantly applied to the infusion tube 101 and the infusion tube 101 can be wound.

As shown in FIGS. 5 to 7, the winding body 30 prevents the infusion tube 101 from being wound by the winding force applied by the winding force applying means 40 in a state in which the external force is not applied to the infusion tube 101. It has a winding lock means 50.

The winding lock means 50 is provided with a leaf spring 52 and a ball 53 in a groove 51 extending in the radial direction, which is provided in a portion of the winding case 20 on the inner side surface of the case body 21 facing the back surface of the main spring case 41. Are arranged. The ball 53 is repelled by the leaf spring 52 toward the pullout direction rotation allowance groove 54A and the winding direction rotation stop groove 54B provided on the back surface of the mainspring spring case 41, and the ball 53 of the case main body 21 along the concave groove 51. It is housed in the groove 51 so as to be rotatable in the radial direction.

The winding lock means 51 rotates the ball 53 in the pull-out direction of the spiral spring case 41 when the pull-out external force is applied to the infusion tube 101 wound around the wind-up body 30 to rotate the wind-up body 30 in the pull-out direction. The winding body 30 and the mainspring spring case 41 are continuously rotated in the pulling-out direction without being blocked by the balls 53 by relatively moving the winding body 30 in the positive direction of rotation of the winding body 30 with respect to the allowable groove 54A. It

When the external pulling force applied to the liquid transfusing tube 101 wound around the winding body 30 is released, the winding lock means 50 removes the winding body 30 by the winding force applied by the winding force applying means 40. While rotating in the winding direction, the ball 53 relatively moves in the opposite pull-out direction with respect to the pull-out direction rotation allowance groove 54A of the mainspring spring case 41 by a fixed length, and winds the infusion tube 101 around the winding body 30 by a fixed length. .. After the infusion tube 101 is wound around the winding body 30 by a certain length, when the ball 53 abuts in the winding direction rotation preventing groove 54B of the main spring case 41 in the winding direction, the winding is performed. The body 30 and the spiral spring case 41 are prevented from rotating by the above-mentioned abutment between the ball 53 and the winding direction rotation preventing groove 54B, and the winding of the infusion tube 101 by the winding force applied by the winding lock applying means 40 is prevented. To do.

Therefore, in the infusion device 100, the one end side portion (the infusion bag 103 side) and the other end side portion (the needle 104 side) of the infusion tube 101 wound around the winding body 30 in the winding device 10. By applying the pull-out external force to one of them, or by applying the pull-out external force to both of them, both of them can be pulled out from the winding body 30 at the same time. Then, when the pull-out external force is released, both the one end side portion and the other end side portion of the liquid transfusing tube 101 are simultaneously wound around the winding body 30 by a certain length by the winding force of the winding force imparting means 40B, After that, the winding lock means 50 prevents the infusion tube 101 from being wound.

According to this embodiment, the following operational effects are obtained.
(a) The winding body 30 of the winding device 10 enables the infusion tube 101 to be wound and pulled out. Therefore, the infusion tube 101, which has been lengthened in advance due to the convenience of inspection or the like, is neatly tied up by the winding body 30 at a portion other than the inspection, and is conveniently pulled out from the winding body 30 at the time of inspection. Can be used in good length. That is, the infusion tube 101 can be handled with an appropriate length.

Further, when an unexpected external force acts on the infusion tube 101 due to the patient M carelessly separating from the infusion table 102 or the like, the infusion tube 101 is freely pulled out from the winding body 30 by the unexpected external force, and the external force is applied. It is avoided that the needle 104 on the other end side is reached. There is no risk that the needle 104 inserted into the blood vessel or the like of the patient M will come out of the blood vessel or that the blood vessel, tissue, etc. around the needle will be damaged. When the unexpected external force disappears, the portion of the infusion tube 101 pulled out by the external force is rewound on the winding body 30 again. That is, an unexpected external force acting on the infusion tube 101 can be buffered.

(b) The winding body 30 enables both the one end side portion and the other end side portion of the liquid transfusing tube 101 to be rolled up or pulled out at the same time. That is, the winding body 30 is capable of simultaneously winding both end portions of the infusion tube 101 by rotating in the winding direction. Further, the winding body 30 makes it possible to simultaneously draw out both end portions of the infusion tube 101 by rotating in the drawing direction.

(c) The winding body 30 is set such that the radius of curvature of the infusion tube 101 wound around the winding body 30 is larger than the minimum dangerous bending radius KR at which the infusion tube 101 may be broken. Therefore, the liquid transfusing tube 101 does not have a possibility of being broken and blocking the liquid flow in the bent state wound around the winding body 30, and can always maintain stable liquid feeding performance.

(d) The take-up body 30 has a take-up force applying means 40 for constantly giving a take-up force for taking up the infusion tube 101 around the take-up body 30 to the take-up tube. Therefore, the infusion tube 101 is constantly urged in the winding direction by the winding force of the winding force applying means 40. The liquid transfusing tube 101 is pulled out by an external pulling force applied by the user so as to exceed the winding force, and when the external pulling force is released, the infusion tube 101 is ready to be wound by the winding force.

Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration of the present invention is not limited to this embodiment, and even if there is a design change or the like within the scope not departing from the gist of the present invention. Included in the present invention. For example, the method of winding the infusion tube with the winding body is not limited to that of the above-described embodiment.

Further, the winding body does not necessarily need to be able to simultaneously wind up or pull out both the one end side portion and the other end side portion of the infusion tube. The winding body may be one in which only one of the one end side portion and the other end side portion of the infusion tube can be wound or pulled out.

Further, the winding body does not necessarily have the winding lock means.

Advantageous Effects of Invention According to the present invention, it is possible to provide an infusion tube winding device and an infusion device that allow the infusion tube to be handled in an appropriate length and buffer an unexpected external force acting on the infusion tube.

10 Winding device
20 winding case
23 Lid
24 Spindle 30 Winding body
31 Bearing hole
34 Middle High School
34A tube loading groove
35 Tube Winding Unit 40 Winding Force Applying Means 50 Winding Locking Means 100 Infusion Device 101 Infusion Tube

Claims (7)

A winding device for an infusion tube, comprising a winding body capable of winding and pulling out the infusion tube, which is built in a winding case and rotatably pivotally attached to a spindle provided in the winding case. ,
The winding body has a middle height portion having a bearing hole fitted to a support shaft provided in the winding case, and a tube winding portion around the middle height portion,
The middle height portion has a stepped shape with a certain height in the axial direction of the bearing hole with respect to the tube winding portion, and passes through the bearing hole and two positions that are diametrically opposed to each other on the circular outer circumference of the middle height portion. Equipped with a constant depth tube loading groove,
The middle portion of the infusion tube is fitted into the tube loading groove portion of the middle and high portion and loaded so as to form an S shape,
One end side portion and the other end side portion of the infusion tube extending from the tube loading groove portions at two positions on the outer circumference of the middle height portion that are opposed to each other on the diameter side to the tube winding portion side are located above the middle portion of the tube winding portion. It is wound along a circular outer circumference and forms a spiral spiral that is aligned with each other.
The wound state of the infusion tube loaded into the tube loading groove portion provided in the middle height portion and wound on the tube winding portion is covered and held by the lid body provided in the winding case,
A device for winding an infusion tube, in which both one end side and the other end side of the infusion tube are simultaneously wound by rotation of the winding body in the winding direction, or simultaneously withdrawn by rotation of the winding body in the withdrawing direction . The tube loading groove portion provided in the middle height portion of the winding body has a groove depth x shallower than the outer diameter d of the infusion tube, and a groove width y longer than the outer diameter d of the infusion tube.
The transfusion tube, which is loaded so as to be pushed into the tube loading groove and held in its loaded state by the lid, has an elliptical cross section having a major axis in the groove width direction of the tube loading groove. The infusion tube winding device described. The infusion solution according to claim 1 or 2, wherein the winding body has a radius of curvature of an infusion tube wound around the winding body set to be larger than a minimum critical bending radius at which the infusion tube may be broken. Tube winding device. The infusion tube according to any one of claims 1 to 3, wherein the winding body includes a winding force imparting unit that constantly imparts a winding force for winding the infusion tube around the winding body to the infusion tube. Winding device. The winding body is
The infusion tube according to claim 4, further comprising a winding lock means for preventing the infusion tube from being wound by the winding force applied by the winding force applying means under the condition that the pulling external force is not applied to the infusion tube. Take-up device. The winding body is
With the external force applied to the infusion tube being released, the infusion tube is wound by a certain length by the winding force applied by the winding force imparting means, and then wound by the winding force imparting means. The infusion tube winding device according to claim 5, further comprising a winding lock means for preventing winding of the infusion tube by force. An infusion device comprising the infusion tube winding device according to any one of claims 1 to 6.

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