JPH0639116Y2 - Roller pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a roller pump used for medical purposes such as an extracorporeal circulation circuit of blood in an artificial lung and an artificial heart, and continuous administration of drug solutions and infusions.

[Prior Art] Conventionally used roller pumps include those shown in FIGS. 9 to 13, for example. FIG. 9 is a perspective view showing the entire conventional roller pump, FIG. 10 is a front view of the roller pump, FIG. 11 is a plan view showing a state in which an opening / closing lid is removed, and FIG. 12 is XII of FIG. -Cross-sectional view corresponding to line XII, No. 1
FIG. 3 is a cross-sectional view showing a state where the tube has fallen off from the roller, which is related to the section XIII in FIG.

The roller pump 10 has a substantially rectangular parallelepiped shape and includes a pump case 11 having an upper surface as an opening. A drive shaft 12 is arranged at the center of the pump case 11. The drive shaft 12 is connected to a motor (not shown) via a speed reducer, and can be rotated in the direction of arrow A by driving the motor. Here, the reduction gear is arranged in the reduction gear case 13 below the pump case 11, and the motor is arranged in the motor case 14 below the reduction gear case 13. A roller holder 15 is attached to the drive shaft 12 which is rotationally driven in the direction of arrow A.
Is attached. The roller holder 15 has a plane circular shape and is rotated in the direction of arrow A by the rotation of the drive shaft 12. As shown in FIG. 12, the rotating roller holder 15 has an upper support plate 16
And a lower support plate 17 is provided. Upper and lower support plates 16, 17
Roller shafts 18A and 18B are arranged between the rollers.
18A and 18B are support plates with upper and lower ends corresponding respectively.
It is fixed to 16 and 17. The two roller shafts 18A and 18B are
As shown in FIG. 11, they are arranged at opposing positions with the drive shaft 12 as the center. A roller 19 is rotatably supported by the two roller shafts 18A and 18B.

A curved guide path 20 is formed on the upper surface of the pump case 11. The guide passage 20 extends along the peripheral portion of the roller holder 15, and an inlet portion 21 and an outlet portion 22 of the guide passage 20 are formed on the front surface of the pump case 11. A tube 23 for feeding a fluid such as blood can be attached to the curved guide path 20 in a state of being inserted into the guide path 20. In FIG. 9, a tube 23 provided in the guide passage 20 constitutes a part of the extracorporeal circulation circuit of blood in the artificial lung, and the tube 23 has, for example, a puncture needle on the upstream side and an artificial needle on the downstream side. It is made by attaching a lung device, etc. Further, an opening / closing lid 24 is provided on the upper surface of the pump case 11 to open and close the surface. The opening / closing lid 24 is supported by the pump case 11 via a hinge member 25 and can be opened / closed in the direction of arrow B with respect to the pump case 11.

The operation of the roller pump 10 thus configured is performed in a state where the tube 23 is inserted into the guide passage 20 and the opening / closing lid 24 is closed to support the tube 23 in the guide passage 20. The operation of the roller pump 10 is performed by rotating the roller holder 15. That is, when the roller holder 15 is continuously rotated in the direction of arrow A, the rollers provided in the holder 15 are rotated.
19 is rotated while pressing the tube 23 attached to the tube pressure-closing support portion 26 of the guide path 20 in sequence on the pressure-closing operation roller surface. That is, when the roller 19 rotates in the direction of arrow C and the tube 23 is pressed between the pressure-closing operation roller surface of the roller 19 and the curved tube pressure-closing support portion 26, the blood in the tube 23 is removed. It will be pressure-fed from the upstream side to the downstream side in the direction of the arrow D. As a result, the roller pump 10 forming a part of the extracorporeal circulation circuit for blood can circulate blood in a pumped state.

[Problems to be Solved by the Invention] However, the roller pump configured as described above
In the case of 10, since the tube 23 attached to the guide path 20 is not reliably positioned in the guide path 20, the tube 23 moves vertically with respect to the pressure-closing operation roller surface of the rotated roller 19. There was a risk of moving in the direction of arrow E in Fig. 12).
In this way, when the tube 23 moves up and down, there is a risk that the tube 23 may separate from the roller 19 outside the pressure-closing operation roller surface, as shown in FIG. In such a case, the pressure closure by the roller 19 is not reliably performed, so that the fluid such as blood is not smoothly circulated. In addition, there is a risk that the rotating roller holder 15 may damage or break the tube 23 separated from the pressure-closing operation roller surface of the roller 19.

Therefore, conventionally, the roller pump 30 shown in FIG. 14 has been proposed. The roller pump 30 includes an upper positioning roller 31A and a lower positioning roller 31B on the periphery of the roller holder 15.
Be supported. The positioning rollers 31A and 31B are rotatable in the F direction shown by the arrow. That is, of the positioning rollers 31A and 31B, the upper positioning roller 31A is arranged above the guide path 20 and the lower positioning roller 31B is arranged below the guide path 20. As a result, the tube attached in the guideway 20
The roller 23 comes into contact with the rollers 31A and 31B and is positioned in the guide path 20.

However, in a small roller pump, it has been difficult to attach the positioning rollers 31A and 31B of this kind from the viewpoint of work or cost.

[Object of the Invention] The present invention ensures that the tube is securely closed by the roller pressing surface of the roller regardless of the size of the roller pump to ensure a smooth pumping state of the fluid, The purpose is to prevent disconnection and avoid tube damage.

[Means for Solving the Problems] The present invention provides a pump case, a curved guide path formed on the surface of the pump case, to which a tube for fluid supply can be attached, and a curved guide path. A roller holder that is supported by a drive shaft that is provided and that is rotated by the drive of the drive shaft; and a tube that is disposed in the roller holder and that is attached in the tube attachment region of the guide path by the rotation of the roller holder. A pressure-closing operation roller surface that presses against a tube compression-closing support portion formed by the side wall of the guide path is provided, and the fluid in the tube is sequentially moved from the upstream side to the downstream side while being rotated by the rotation of the roller holder. In a roller pump comprising a roller capable of being pressure-fed, the roller pump is extended to a position below the tube attachment region of the guide path and in sliding contact with a side wall of the guide path, While supporting the lower holding plate, which is a sliding surface whose contactable surface is formed of tetrafluoroethylene, on the roller holder,
An upper holding plate that extends to a position near the side wall of the guide path above the tube attachment area of the guide path and has a surface that can contact the tube as a sliding surface is provided on the roller holder. It is designed to be supported.

[Operation] According to the present invention, there are the following operation effects.

Upper and lower holding plates are provided above and below the tube attachment region of the guide path, the lower holding plate is in sliding contact with the side wall of the guide path, and the upper holding plate is close to the side wall of the guide path. Therefore, even if the tube moves in the vertical direction, the position of the tube is reliably regulated within the surface of the pressure-closing operation roller of the roller due to the existence of the upper and lower holding plates, and the tube does not come out of the surface of the pressure-closing operation roller. As a result, regardless of the size of the roller pump, the tube can be surely pressed and closed by the pressing and closing operation roller surface of the roller, and a smooth pumping state of the fluid can be secured.

As described above, since the tube does not separate from the surface of the roller for pressing and closing the roller, the rotating roller holder does not damage the tube that separates from the surface of the roller for pressing and closing the roller.

In the upper and lower holding plates, the surface that may come into contact with the tube is a smooth surface formed of lubricious tetrafluoroethylene, so the tube swings in the vertical direction and the upper and lower holding plates Even when they come into contact with each other, damage to the tube can be avoided.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 is a perspective view showing an entire roller pump according to an embodiment of the present invention, FIG. 2 is a front view of the roller pump, FIG. 3 is a plan view showing a state in which an opening / closing lid is removed, and FIG. Is shown in FIG.
Sectional view taken along line IV-IV, FIG. 5 is a sectional view taken along line VV of FIG. 3, FIG. 6 is a perspective view of the lower holding plate, and FIG. 7 (A) is a plan view of the upper holding plate. , FIG. 7 (B) is a front view of the upper holding plate,
FIG. 7 (C) is a bottom view of the upper holding plate, and FIG. 7 (D) is a side view of the upper holding plate.

The roller pump 40 has a substantially rectangular parallelepiped shape and includes a pump case 41 having an upper surface as an opening. At the lower position inside the pump case 41, as shown in FIG.
42 is provided. The drive shaft 42 is connected to a motor (not shown) via a speed reducer. This allows the drive shaft 42 to rotate in the G direction shown by the arrow. Here, the reducer is arranged in the reducer case 43 below the pump case 41, and the motor is the motor case below the reducer case 43.
It is arranged in 44.

A roller holder 45 is attached above the drive shaft 42 which is rotated in the direction of the arrow G by driving the motor. Roller holder 45
Is provided with a tubular portion 46 below, and a plurality of holder bearings 47 are provided between the outer portion of the tubular portion 46 and the inner portion of the pump case 41.
Is provided. Roller holder 45 supported by the drive shaft 42
Can be rotated in the arrow G direction by the rotation of the drive shaft 42. At this time, since the roller holder 45 has the cylindrical portion 46 of a predetermined length extending downwardly supported by each holder bearing 47,
Lateral shake due to the rotation of the holder 45 can be minimized. Above the roller holder 45 are two rollers 48
A and 48B are provided respectively. Each roller 48A and 4
The 8Bs are arranged at opposing positions with the rotation center O of the drive shaft 42 interposed therebetween (see FIG. 3). Each roller 48A and 48B
Has a support shaft 49 supported and fixed to the roller holder 45 at the center. Further, a bearing support 50 is supported on the outer side of the support shaft 49, and a plurality of roller bearings 51 are supported on the support 50. A roller drum 52 is supported on the outer side of the roller bearing 51. The roller drum 52 is rotatable in the arrow H direction with respect to the bearing support 50 due to the presence of the roller bearing 51 interposed therebetween. A guide path, which will be described later, is provided at a peripheral position above the roller holder 45 below the rollers 48A and 48B.
A lower holding plate 53 is disposed below the tube attachment area of 58 and extends to a position where it slides on the side wall of the guide path 58. The lower holding plate 53 is formed of a ring-shaped member as shown in FIG. 6, and can be fitted and supported on the upper peripheral portion of the roller holder 45 as shown in FIG. An upper surface of the lower holding plate 53 supported by the roller holder 45, which can come into contact with a tube 61 described later, is a lower slipping surface 53A formed by applying ethylene tetrafluoride or the like. Meanwhile, each roller 48A and 48
Above B, an upper holding plate 54 is provided that extends up to a position close to the side wall of the guide path 58 above a tube attachment area of the guide path 58 described later. The upper holding plate 54 is the fifth
As shown in the figure, it is supported on the upper part of the support pillar 55, and the support pillar 55 is erected on the upper surface of the roller holder 45. The upper holding plate 54 is supported on the support columns 55 by fixing the upper holding plates 54 to the support columns 55 using screws 56. Therefore, the upper holding plate 54 is formed with a hole 56A for inserting the screw 56 [FIGS. 7 (A) to (C)]. Upper holding plate 54
2 in the circumferential direction (J direction shown in FIG. 3).
Two notches 57A and 57B are provided. Each of these notches
Reference numerals 57A and 57B are for inserting tubes, which will be described later, and the notches 57A and 57B are arranged at opposite positions with the center of rotation of the drive shaft 42 interposed therebetween (see FIGS. 3 and 7 ( See A)]. A lower surface of the upper holding plate 54 supported by the support columns 55, which can come into contact with a tube 61 described later, is an upper slipping surface 54A formed by applying tetrafluoroethylene or the like.

A curved guide path 58 is formed on the upper surface of the pump case 41. The guide passage 58 extends along the peripheral portion of the roller holder 45, and an inlet portion 59 and an outlet portion 60 of the guide passage 58 are formed on the front surface of the pump case 41, respectively. A tube 61 for feeding a fluid such as blood can be attached to the curved guide path 58 in a state of being inserted into the guide path 58. In the embodiment, the tube 61 provided in the guide passage 58 constitutes a part of the extracorporeal blood circulation circuit in the artificial lung. That is, as shown by the chain double-dashed line in FIG.
A puncture needle 62 for puncturing a human body is attached to the upstream side of the. An artificial lung device 63 is attached to the downstream side.

To attach the tube 61 to the guide path 58, first,
From 59, the middle part of the tube 61 is sequentially inserted. The tube 61 is inserted in a state in which the tube 61 is along the guide path 58 of the front U-shaped inlet portion 59 as shown in FIG. When the tube 61 is inserted into the guide path 58 having a flat curved shape, the tube 61 is pushed in from the notch 57A or 57B as shown by the chain double-dashed line in FIG. When the tube 61 is inserted from the cutout portion 57A or 57B as shown in FIG. 1, the roller holder 46 is rotated in the direction of arrow G using a finger or the like. As a result, the tube 61 is gradually inserted from the inlet 59 of the curved guide path 58 toward the outlet 60 and attached.

In this way, the tube 61 attached in the guide path 58 is
The rollers 48A and 48B are located at positions facing the pressure-closing operation roller surface formed by the roller drum 52. Further, the tube 61 provided in the guide path 58 is
The surfaces of the pressure-closing operation rollers A and 48B are pressed against the tube pressure-closing support portion formed on the side wall of the guide path 58. The tube 61 in the guide path 58 has the upper surface at the lower part and the lower slip surface 53.
The ring-shaped lower holding plate 53 designated as A is positioned.
On the other hand, a covering portion 63 is formed at the position of the peripheral portion 4 of the upper holding plate 54 [see FIGS. 5 and 7 (A) and (C)]. The covering portion 63 is projected above the guide path 58. As a result,
As shown in FIG. 5, the tube 61 in the guide path 58 is covered with the covering portion 63 of the upper holding plate 54 whose lower surface is the upper sliding surface 54A.

On the upper surface of the pump case 41 to which the tube 61 is attached, an opening / closing lid 64 for opening / closing the surface is provided. The opening / closing lid 64 is supported by the pump case 41 via a hinge member 65, and can be opened / closed in the arrow K direction with respect to the pump case 41. On the inner surface side of the opening / closing lid 64, two convex portions 66A and 6A are provided.
6B is formed. Of these, the convex portion 66A is formed at a position facing the inlet portion 59 in the guide path 58, and the convex portion 66B is
It is formed at a position facing the outlet portion 60 in the guide path 58. That is, each of the convex portions 66A and 66B abuts on the tube 61 provided in the guide path 58 in a state where the opening / closing lid 64 is closed so that the tube 61 in the guide path 58 can be held and positioned. Among these, the convex portion 66A can hold and position the suction side tube 61 attached to the inlet portion 59 side. On the other hand, the convex portion 66B can hold and position the discharge side tube 61 attached to the outlet portion 60 side.

[Operation of Embodiment] Next, the operation of the above embodiment will be described.

FIG. 8 shows an extracorporeal circulation circuit of an artificial lung formed by using the roller pump 40 according to the above embodiment. This extracorporeal circulation circuit enables the blood collected from the human body by the puncture needle 62 to be pumped in the direction of the arrow L through the operation of the roller pump 40. The operation of the roller pump 40 is performed by rotating the roller holder 45. That is, when the roller holder 45 is continuously rotated in the arrow G direction by driving the motor, the holder 45 is rotated.
The rollers 48A and 48B provided for the tube compression closing support roller 67 in the guide path 58 are sequentially arranged on the pressure closing operation roller surface.
It rotates while pressing the tube 61 attached to the. This allows each roller 48A and 48B roller drum
52 rotates in the direction of arrow M, the tube 61 is pressed, and the blood in the tube 61 is pumped in the direction of arrow L from the upstream side to the downstream side. The blood pumped by the operation of the roller pump 40 is supplied to the artificial lung device 63, and the device 63 allows the supplied blood to be gas exchanged. The gas-exchanged blood is further supplied to the blood heat exchanger 68 via the tube 61. The heat exchanger 68 can raise the temperature of the supplied blood to a predetermined temperature and reheat it. The blood reheated by the heat exchanger 68 in this way is further pressure-fed in the direction of the arrow L and supplied to the human body.

In this way, the roller pump 60 used can securely hold and position the tube 61 in the guide path 58 only by attaching the tube 61 to the guide path 58 and closing the opening / closing lid 64. Becomes That is, the convex portions 66A and 66B provided on the closed opening / closing lid 64 securely hold the suction side and the discharge side of the tube 61, and thus the tube 61 in the guide path 58 is prevented from rolling by the rollers. The problem of leaving 48A and 48B will be resolved.

Further, even when the roller holder 45 is rotated and the tube 61 in the guide path 58 moves in the vertical direction (N direction in FIG. 5), the tube 61 is attached to the side wall of the guide path 58 so that the lower holding plate 53 slides. The position is restricted by the smooth surface 53A or the smooth surface 54A of the covering portion 63 of the upper holding plate 54 near the side wall of the guide path 58. As a result, the tube 61 is reliably positioned in the pressure-closing operation roller surface of the rollers 48A and 48B that contributes to the pressure-closing operation at all times, and the problem that the tube 61 separates from the roller as in the conventional case is eliminated. It will be.

In addition, since the tube 61 does not separate from the surface of the rollers 48A and 48B in the pressure closing operation roller, the rotating roller holder 45 may damage the tube 61 that separates from the surface of the rollers 48A and 48B in the pressure closing operation roller. There is no.

Further, even if the slidable surfaces 53A, 54A and the tube 61 are in sliding contact with each other, the problem of damaging or damaging the tube 61 can be solved.

As a result, the tube 61 can be reliably positioned in the guide path 58 regardless of the size of the roller pump manufactured, and a smooth blood pumping state can be obtained.

[Advantage of the Invention] As described above, according to the present invention, regardless of the size of the roller pump, the tube is reliably pressed and closed by the pressing and closing operation roller surface of the roller, and the smooth pumping state of the fluid is ensured. Avoiding tube damage.

[Brief description of drawings]

FIG. 1 is a perspective view showing an entire roller pump according to an embodiment of the present invention, FIG. 2 is a front view of the roller pump, FIG. 3 is a plan view showing a state in which an opening / closing lid is removed, and FIG. IV in Figure 3
-IV is a sectional view taken along line IV, FIG. 5 is a sectional view taken along line VV of FIG. 3, FIG. 6 is a perspective view of a lower holding plate, and FIG. 7A is a plan view of an upper holding plate. 7 (B) is a front view of the upper holding plate, FIG. 7 (C) is a bottom view of the upper holding plate, FIG. 7 (D) is a side view of the upper holding plate, and FIG. 8 is shown in FIG. It is a perspective view which shows the extracorporeal circulation circuit of the artificial lung formed using the roller pump shown. Further, FIG. 9 is a perspective view showing the whole of a conventional roller pump, FIG. 10 is a front view of the roller pump, FIG. 11 is a plan view showing a state in which an opening / closing lid is removed, and FIG. 12 is FIG. XII-XI
A cross-sectional view corresponding to the line I, FIG. 13 is a cross-sectional view showing a state in which the tube has fallen off from the roller according to the section XIII in FIG.
Further, FIG. 14 is a sectional view showing another conventional roller pump. 40 …… Roller pump, 41 …… Pump case, 42 …… Drive shaft, 45 …… Roller holder, 48A, 48B …… Roller, 53 ……
Lower holding plate, 53A …… Lower sliding surface, 54 …… Upper holding plate, 54A ……
Upper slippery surface, 58 …… Guideway, 61 …… Tube, 67 …… Tube compression closing support.

Claims (2)

[Scope of utility model registration request] 1. A pump case, a curved guide path formed on a surface of the pump case, to which a fluid feeding tube can be attached, and a drive shaft supported in the pump case. A roller holder that is rotated by the drive of the drive shaft, and a tube that is disposed in the roller holder and that is attached to the tube attachment area of the guide path by the rotation of the roller holder is formed on the side wall of the guide path. And a roller capable of sequentially pumping the fluid in the tube from the upstream side to the downstream side while rotating by the rotation of the roller holder. In this roller pump, the surface of the guide passage is extended to a position where it slides on the side wall of the guide passage below the tube attachment region of the guide passage, and the surface that can come into contact with the tube is covered by four hooks. A lower holding plate formed of ethylene as a sliding surface is supported by the roller holder and is extended to a position close to the side wall of the guide path above the tube attachment area of the guide path, and A roller pump, characterized in that an upper holding plate having a contactable surface as a sliding surface is supported by the roller holder. 2. The roller pump according to claim 1, wherein the roller holder is provided with a notch portion for inserting / attaching the tube to the guide path.