JPH0639115Y2 - 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 Problem] The above object is to provide 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 provided in the pump case. 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 the tube that is provided in the roller holder and that is provided within the tube attachment region of the guide path by the rotation of the roller holder. Is provided on the side wall of the guide path to press the tube closed support portion, and the fluid in the tube is sequentially pumped from the upstream side to the downstream side while being rotated by the rotation of the roller holder. And a roller that enables the roller to be extended to a position where it slides on the side wall of the guide path at one of the lower side and the upper side of the tube attachment area of the guide path. A holding plate that is provided and has a surface that can come into contact with the tube as a sliding surface is supported by the roller holder, and the lower side or the upper side of the guide path is provided on the other side with respect to the holding plate. It is extended to a position close to the side wall of the guide path, and is interrupted along the circumferential direction from below or above so as to enter the peripheral portion of the other side of the pressing plate in the axial direction of the roller with respect to the holding plate. This is achieved by a roller pump characterized in that a positioning plate having a convex portion that is projected electrically is supported by the roller holder.

[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.
A sectional view taken along line IV-IV, FIG. 5 is a sectional view taken along line VV in FIG. 3, and FIG. 6 (A) is a perspective view showing a lower holding plate.
FIG. 7B is a perspective view showing the lower positioning plate, FIG. 7A is an upper positioning plan view, FIG. 7B is a front view of the upper positioning plate, and FIG. 7C is a top positioning plate. The bottom view and FIG. 7D are side views of the upper positioning 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.
It is extended below the tube attachment area of 58 to a position where it slides against the side wall of the guide path 58, for example, FIG. 6 (A).
The lower holding plate 53 as shown in FIG. The lower holding plate 53 shown in FIG. 6 (A) is formed of a ring-shaped member fitted and supported on the upper peripheral portion of the roller holder 45, and a tube 61 to be described later.
The upper surface that can come into contact with is a lower slipping surface 53A formed by applying tetrafluoroethylene or the like. Lower holding plate 53
Will be positioned below the operating region T1 of each of the rollers 48A and 48B as shown in FIG. 4 or 5 while being supported by the roller holder 45.

On the other hand, above the rollers 48A and 48B, there is a guideway described later.
An upper positioning plate 54 that extends to a position close to the side wall of the guide path 58 is provided above the tube attachment area of 58. The upper positioning plate 54 is a plate-like member having a substantially elliptical plane as shown in FIGS. 7 (A) to (D). Upper positioning plate
As shown in FIG. 5, 54 is supported on the upper part of a supporting column 55, and the supporting column 55 is erected on the upper surface of the roller holder 45. The upper positioning plate 54 is supported by the support pillars 55 with screws.
The upper positioning plate 54 is fixed to the support column 55 by using 56.

Therefore, the upper positioning plate 54 is formed with a hole 56A for inserting the screw 56 [see FIGS. 7 (A) to 7 (C)]. Upper convex portions 54A are formed at four intermittent positions in the circumferential direction [J direction] of the elliptical upper positioning plate 54, respectively. The upper convex portion 54A is formed so as to project on the bottom surface of the upper positioning plate 54, and the upper convex portion 54A is pressed in the axial direction of each roller 48A and 48B in a state where the upper positioning plate 54 is supported by a support column. It is projected from above so as to enter the upper end side peripheral portion of the closing operation region T1 [see FIG. 5]. Furthermore, two notches 57A and 57B are provided at two locations in the circumferential direction [J direction] of the upper positioning plate 54, respectively. These notches 57A and 57B are for inserting tubes, which will be described later, and the notches 57A and 57B are arranged at opposite positions sandwiching the rotation center of the drive shaft 42 (see FIG. 3). ).

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 ring-shaped lower holding plate 53A on the lower portion thereof.

On the other hand, the upper convex portions 54A of the upper positioning plate 54 are located above the tube 61 provided in the guide path 58. The upper convex portion 54A is in the circumferential direction of the upper positioning plate 54 [J direction].
It is formed at four intermittent positions. As a result,
The tube 61 has a smooth surface 53A on the lower side and an upper convex portion 54A on the upper side.
The position will be regulated by.

[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.
Even when the tube 61 in the guide path 58 moves in the vertical direction [N direction in FIG. 5], the tube 61 slides on the lower side of the guide path 58 as shown in FIG. 6 (A). The lower holding plate 53 in contact with the upper positioning plate 54 positions the upper side of the upper holding plate 54 close to the side wall of the guide path 58 as shown in FIGS. At this time, for example, when the tube 61 is moved downward,
Is regulated by the lower slidable surface 53A of the lower holding plate 53, and as a result, the tube 61 is positioned within the pressure-closing operation roller surface of the rollers 48A and 48B that always contributes to the pressure-closing operation. This eliminates the problem that the tube 61 separates from the roller as in the conventional case, and even when the rotating lower sliding surface 53A and the tube 61 are in sliding contact with each other, the tube 61 may be damaged or damaged. Will be resolved. Further, when the tube 61 is moved to the upper side, the tube 61 is placed on the upper positioning plate.
The position is restricted by the upper convex portion 54A of 54. At this time, the upper convex portions 54 are provided intermittently in the circumferential direction of the upper positioning plate 54, and thus the coefficient of friction with the tube 61 can be reduced. Therefore tube 61
Will be prevented from being damaged or damaged. Therefore, the problem that the tube 61 in the guide path 58 is detached to the upper side with respect to the roller 48A or 48B is resolved,
Each roller 48A or 48B enables the tube 61 to be securely closed.

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.

In the above embodiment, the tube 61 in the guide path 58 is
The lower holding plate 53 and the upper positioning plate 54 are arranged above and below, respectively.
A lower positioning plate 70 as shown in FIG. 6 (B) may be arranged on the lower side of the tube. That is, the lower positioning plate 70 can be fitted and supported by the roller holder 45, and the lower convex portion 70A is formed at five positions in the circumferential direction [J direction] of the positioning plate 70. This lower convex portion 70A is
The lower positioning plate 70 is supported by the roller holder 45 and can project into the operation region T1 of the roller 48A or 48B.
On the other hand, such a guide path 58 facing the lower positioning plate 70 is formed.
An upper holding plate having a lower surface as a sliding surface is arranged above the above. With this, the position of the tube 61 in the guide path 58 may be restricted by the lower convex portion 70A and the sliding surface of the upper holding plate.

[Advantage of Invention] According to the present invention, the following effects are obtained.

A holding plate is provided below or above the tube attachment region of the guide path, and the holding plate is in sliding contact with the side wall of the guide path. Therefore, even if the tube moves downward or upward, 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 holding plate, and the tube does not separate from the surface of the pressure-closing operation roller.

A positioning plate is provided below or above the tube attachment area of the guide path on the other side with respect to the holding plate, and the positioning plate is provided below or above the guide path on the other side with respect to the holding plate. Is extended to a position close to the side wall of the roller, and intermittently protrudes from below or above along the circumferential direction so as to enter the peripheral portion of the other end side of the pressing plate in the axial direction of the roller with respect to the holding plate. It has a convex part. Therefore, even if the tube moves downward or upward, the position of the roller is surely regulated within the inward range of the end portion of the roller surface of the pressure closing operation roller due to the presence of the positioning plate, and the tube is separated from the surface of the pressure closing operation roller surface. Never.

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.

According to the above, the tube does not separate from the surface of the roller for pressing and closing the roller, so that the rotating roller holder does not damage the tube that separates from the surface of the roller for pressing and closing the roller.

Since the surface of the holding plate that may come into contact with the tube is a smooth surface, damage to the tube can be avoided even when the tube swings either downward or upward and comes into contact with the holding plate.

[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 in FIG. 3, FIG. 6 (A) is a perspective view showing a lower holding plate, and FIG. 6 (B) is a lower positioning plate. FIG. 7 (A) is a plan view of the upper positioning plate, FIG. 7 (B) is a front view of the upper positioning plate, and FIG. 7 (C) is a bottom view of the upper positioning plate. (D) is a side view of the upper positioning plate. FIG. 8 is a perspective view showing an extracorporeal circulation circuit of the artificial lung formed by using the roller pump shown in FIG. 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-XII line cross-sectional view,
FIG. 13 is a cross-sectional view showing a state where the tube has fallen off from the roller in relation to the XIII portion of FIG. 12, and FIG. 14 is a cross-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 positioning plate, 54A
...... Upward convex part, 58 ...... Guide path, 61 ...... Tube, 67 ...... Tube compression closing support part, 70 ...... Lower positioning plate, 70A ...... Lower convex part.

Claims (3)

[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 the tube that is disposed in the roller holder and that is attached in the tube attachment area of the guide path by the rotation of the roller holder on the side wall of the guide path. And a roller that is provided with a compression-closing operation region that presses against the tube compression-closing support portion that is formed, and that is 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 the roller pump configured as above, the roller pump is extended to a position that is in sliding contact with the side wall of the guide path at one of the lower side and the upper side of the tube attachment area of the guide path, and can contact the tube. A position where a holding plate whose functioning surface is a sliding surface is supported by the roller holder, and which is located below or above the guide passage and on the other side of the holding plate and close to the side wall of the guide passage. A convex portion extending in the circumferential direction from below or above so as to penetrate into the peripheral portion of the other end of the pressing plate in the axial direction of the roller with respect to the holding plate. A roller pump characterized in that the positioning plate that is provided is supported by the roller holder. 2. The roller pump according to claim 1, wherein the lubrication surface of the holding plate is formed of ethylene tetrafluoride. 3. The roller pump according to claim 1, wherein the roller holder is provided with a cutout portion for inserting / attaching the tube to the guide path.