JPH08247039A - Roller pump - Google Patents

Abstract

PURPOSE: To prevent a tube from being deformed even when it is arranged between the first projection or the second projection and a stator. CONSTITUTION: A substrate 1 is provided with a stator 2 reciprocatable in parallel with the plane of the substrate 1. A rotor 34 force-feeding a liquid while being rolled to press a tube T arranged between the substrate 1 and the stator 2 is provided on the substrate 1 located in the stator 2. The rotor 34 is provided with upper and lower projections 41, 42. The stator 2 is provided with a cover 15 not located at the closing position when the tube T is pinched between the stator 2 and the upper projection 41 to cover the upper section of the stator 2. A compression spring exciting the projections 41, 42 to the tube T side is provided in a storage cylinder 43. When the guide of the projections 41, 42 is incomplete, they are retreated to the side opposite to the tube T against the elastic force of the exciting member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller pump for pressure-feeding liquids such as blood, dialysate and medicines flowing in tubes.

[0002]

2. Description of the Related Art Conventionally, a roller pump of this type is known as shown in FIG. That is, on the substrate 70, a substantially U-shaped stator 71 is provided along the peripheral edge thereof. On the substrate 70 in the space surrounded by the stator 71, a rotor 73 having a pair of rollers 72 on its sides is rotatably arranged. A tube 74 is detachably arranged in the gap between the stator 71 and the rotor 73. Then, as the rotor 73 rotates, the roller 72 rotates while continuously pressing the tube 74.
By this operation, the liquid in the tube 74 is intermittently pumped along the rotation direction of the roller 72.

A pair of tube guides 75 are arranged on the side of the rotor 73 at positions opposite to each other. The tube guide 75 is composed of an upper protrusion 76 and a lower protrusion 77 which are arranged at a predetermined interval. A tube 74 is disposed between the upper protrusion 76 and the lower protrusion 77, and the tube 74 is guided by the upper and lower protrusions 76 and 77. Then, when the rotor 73 rotates,
The tube 74 is fixed to the roller 72 by the tube guide 75.
Since it is located at a fixed position, a fixed amount of liquid is pumped.

[0004]

By the way, according to the prior art, when the tube 74 is attached to the gap between the stator 71 and the rotor 73, the tube 7 is attached to the tube guide 75.
4 must be installed properly. However, when the tube 74 is attached in a state of being sandwiched between the upper protrusion 76 or the lower protrusion 77 of the tube guide 75 and the inner wall of the stator 71, when the roller 72 rotates, either of the protrusions 76, 77 will cause the tube 74 to move. It rotates while pressing. Therefore, the tube 74 is pressed not only by the roller 72 but also by the upper protrusion 76 or the lower protrusion 77, so that there is a possibility that the amount of liquid pumped in the tube 74 cannot be kept uniform. In particular, the lower protrusion 77 is the tube 74.
To check whether or not the
Since the upper protrusion 76 is provided above, it is difficult to confirm.

The present invention has been made by paying attention to the problems existing in such a conventional technique, and its object is to make the tube have a first projection or a second projection. It is an object of the present invention to provide a roller pump which can prevent the tube from being deformed even when it is arranged between the stator and the stator.

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 is to provide a stator provided on a substrate and capable of reciprocating in a direction parallel to the substrate surface, and a position inside the stator. A rotating body that is provided on the substrate and that pumps the liquid in the tube while rotating the tube disposed between the stator and the tube, and the rotating body is provided.
When the rotating body rotates, the rotating body is provided with a first protruding portion that is formed to project outward from the rotating body and is located at a remote position with respect to the substrate, and a second protruding portion that is located at a position close to the substrate. In a roller pump provided with a tube guide for guiding a tube arranged between both projections, at least one of the first projection and the second projection is provided on the rotating body. Is provided with an accommodating portion capable of accommodating a part thereof, and an urging member for urging the protrusion toward the tube is provided in the accommodating portion to resist the elastic force of the urging member when the guides of both protrusions are incomplete. The main point is that it can be retracted to the side opposite the tube.

According to a second aspect of the present invention, the tips of the first protrusion and the second protrusion are both formed in an arc shape, and when both guides are retracted when the guides are incomplete, both protrusions are retracted. The gist of the invention is that the tip of the part projects toward the tube side more than the tip of the accommodation part.

[0008]

In the invention according to claim 1 configured as described above, when the tube is mounted between the rotating body and the substrate, it is placed between the first protrusion or the second protrusion and the stator. When the tube is sandwiched, both protrusions are retracted to the side opposite the tube against the biasing force of the biasing member. This retraction prevents the tube from deforming.

According to the second aspect of the present invention configured as described above, when the first projection or the second projection is retracted when the tube guide is incomplete, the tip of each projection is a receiving portion. Is projected on the tube side from the tip of. Therefore, the tip of the accommodating portion does not come into contact with the surface of the tube during rotation of the rotor, but comes into contact with the tip of each protrusion.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a roller pump for circulating blood in an artificial dialysis apparatus will be described below with reference to the drawings. 1 and 2, the left side is the front and the right side is the rear.

As shown in FIGS. 1 and 2, on the upper surface of the substrate 1, a stator 2 made of hard synthetic resin and having a substantially U-shaped plane is provided along the edge of the substrate 1. The stator 2 is an arm portion 3 that is deformable in the width direction by bending inward,
A pair of square-plate-shaped locking pieces 4 provided at the base end of the arm 3 and a concave tube receiving portion 5 provided at the tip of the arm 3 are integrally formed.

A narrow groove 6 extending in the vertical direction is formed at the base end of the arm portion 3, and a front end opening of the narrow groove 6 is formed in a narrow width. A bolt 7 is inserted into the narrow groove 6, and the lower end of the bolt 7 is screwed into the rear end portion of the substrate 1. Since the diameter of the head portion 7a of the bolt 7 is larger than the width of the narrow groove 6, the head portion 7a prevents the base end of the arm portion 3 from coming off from the substrate 1. A pair of key grooves 8 is formed on the outer wall of the arm portion 3 near both sides of the narrow groove 6. A square metal fitting 9 is fitted in the key groove 8.

As shown in FIGS. 4 and 5, the pair of tube receiving portions 5 are provided so as to protrude from the inner side wall of the arm portion 3 so as to face each other. The upper end surface of each tube receiving portion 5 is formed with a receiving groove 10 for receiving a lower half portion of a tube T described later. A guide pin 11 extending downward is fixed to the lower surface of the tube receiving portion 5. Guide pin 11
Is a guide groove 1 formed in the tip of the substrate 1 and having a plane C-shape.
It is slidably engaged in the inside of the unit 2.

As shown in FIGS. 1 to 3, a pair of bearings 13 are provided upright on the rear end of the upper surface of the substrate 1. A lid 1 having a side face and a substantially L shape is formed on the bearing 13 via a pin 14.
The base end of 5 is rotatably supported. A pair of support pieces 16 extending vertically is integrally formed at the base end of the lid 15. A pair of pressing rollers 18 are rotatably supported in front of the lower ends of the support pieces 16 via shaft support pins 17. Each pressing roller 7 is in contact with the side surface of the metal fitting 9. Then, the pressing roller 18 has a lid 15
With the turning operation of, the metal fitting 9 is rotated along the surface of the metal fitting 9.

At the positions where the locking pieces 4 face each other,
A long hole 19 extending in the vertical direction is provided so as to be transparent. Long hole 19
A movable pin 21 extending in the width direction (horizontal direction) of the stator 2 is penetrated through the both ends of the movable pin 21.
6 is inserted into an oblique hole 20 formed near the center. E-shaped retaining metal fittings 22 are attached to both ends of the movable pin 21 so that the movable pin 21 does not shift in its axial direction.

When the lid 15 is rotated from the closed position to the open position, the movable pin 21 is moved along the oblique hole 20, and the inner wall on the rear side of the elongated hole 19 is moved by the movable pin 2.
It is pressed backward by 1 (in the direction of the arrow indicated by the chain double-dashed line in FIG. 2). That is, the locking piece 4 is moved rearward by the movable pin 21. By this movement, the guide pin 11 is moved from the front to the rear along the guide groove 12, so that the arm portion 3 of the stator 2 opens (FIG. 4 shows the opened state of the arm portion 3). ing.

On the contrary, when the lid 15 is rotated from the open position to the closed position, the pressing roller 18 is rotated and pressed forward (in the direction of the arrow indicated by the solid line in FIG. 4) against the side surface of the metal fitting 9. . That is, the arm 3 is moved forward by the pressing roller 18. By this pressing, the guide pin 11 is moved from the rear to the front along the guide groove 12, so that the arm portion 3 of the stator 2 is closed.

As shown in FIG. 1, a planar circular through hole 23 is formed in the center of the lid 15, and a step portion 23a is formed inside the through hole 23 along the periphery thereof. The through hole 23 is closed by a circular transparent transparent plate 24 made of synthetic resin. A flange 24a extending outward is formed on the periphery of the transparent plate 24, and the flange 24a is formed on the step portion 2
3a is engaged. A communication hole 25 is formed in the center of the transparent plate 24, and the communication hole 25 connects the space 26 surrounded by the arm 3 and the lid 15 to the outside.

As shown in FIG. 7, a ring 27 as a protrusion is fixed to the back surface of the lid 15 along the periphery of the transparent plate 24 by a plurality of screws 28. The upper surface of the peripheral edge of the ring 27 is pressed against the peripheral edge of the transparent plate 24 by the tightening force of the screw 28, so that the transparent plate 24 does not come out of the through hole 23. The lower surface of the ring 27 is integrally formed with a ridge portion 29 extending downward along the circumferential direction. The lower end edge of this protruding portion is located below the upper end surface of the arm portion 3 of the stator 2 at the closed position of the lid 15.

A lid 1 above the tube receiving portion 5
On the back surface of 5, a pressing piece 30 as a pressing member is provided so as to protrude downward. Then, the lid 15 is in the closed position (see FIG.
(The solid line position shown in FIG. 2), the tube T disposed in the space 26 of the stator 2 is inserted between the lower end surface of the pressing piece 30 and the tube receiving portion 5, and both of them are
It is designed to be clamped by.

As shown in FIGS. 1 and 2, a motor 31 is fixed near the center of the lower surface of the substrate 1.
The drive shaft 32 of the above is projected to the upper surface of the substrate 1 through the through hole 33. In the space 26 of the stator 2,
A rotor 34 as a rotating body is connected to the tip of the drive shaft 32. The rotor 34 is the motor 3
It is designed to be rotated by 1.

A pair of roller support members 35 are arranged on both sides of the rotor 34, and the roller support members 35 are swingably supported about a shaft 36. The shaft 36 is arranged at a point-symmetrical position around the rotation axis of the rotor 34. As shown in FIG. 8, a recess 37 is formed at the tip of the roller support 35. A part of the roller 38 extending in the vertical direction is housed in the recess 37, and the roller 3
8 is rotatably supported via a support shaft 39.

A pair of tube guides 40 are provided on the side wall of the roller support 35 so as to project in a direction orthogonal to the axial direction of the rotor 34. Both tube guides 40 are rotors 34
Is located on the opposite side of the rotation axis center of. Each tube guide 40 has an upper protrusion 41 as a first protrusion.
And a lower protrusion 42 as a second protrusion,
The tips of the protrusions 41 and 42 are formed in a hemispherical shape.

As shown in FIG. 6, both lower protrusions 42 are slidably accommodated via a compression spring 44 in a housing cylinder 43 formed so as to project outward from the side wall of the roller support 35. There is. A support rod 45 is provided at the center of the inner end of the lower protrusion 42. The tip of the support rod 45 is the roller support 35.
Is inserted through a bearing hole 47 into a recess 46 formed on the inner wall of the. An E-shaped retaining metal fitting 48 is attached to the tip of the support rod 45. Fall prevention metal fittings 4
8 is brought into contact with the bottom surface of the recess 46, so that the support rod 45 is prevented from coming off the bearing hole 47 along the axial direction thereof.

Further, the rotor 34 is provided with a pair of elastic projections 49 which are arranged at points symmetrical about the axis of rotation of the rotor so as to be retractable from the rotor. The elastic projection 49 is urged to the outside of the rotor 34 by a push spring (not shown), and its tip is in contact with the roller support body 35. Then, the roller support 35
Approaches the rotor 34 against the biasing force of the elastic protrusion 49,
It can be separated from the rotor 34 by the urging force of the elastic protrusion 49.

As shown in FIGS. 1 and 5, a support body 50 having a side T shape is provided on the upper surface of the substrate 1 between the tube receiving portions 5 so as to project. A magnet 51 is provided on the upper surface of the support body 50 as shown in FIG. 4, and the magnet 51 is attachable to and detachable from a metal piece 52 provided on the lower surface of the lid 15. Further, an inclined portion 53 is formed on the upper side wall in front of the support body 50, and this inclined portion 53 makes it easy to open the lid 15 by placing a finger along the lid 15 when opening the lid 15.

A through hole 54 extending vertically is formed in the front end of the substrate 1. An insertion hole 55 extending in the vertical direction and communicating with the outside is formed in the support body 50 located above the through hole 54, and the insertion hole 55 has a smaller diameter than the through hole 54. Further, the lower end opening of the through hole 54 is covered with a cover plate 56 attached to the back surface of the substrate 1, and the cover plate 56 has a through hole 57 having a smaller diameter than the through hole 54.

A bracket 5 is provided on the lower surface of the front end of the board 1.
The micro switch 59 is attached via the cover 8, and the tip of the actuator 60 of the micro switch 59 is attached to the cover plate 56.
Is located in the hole 57. The actuator 6
The lower end of a movable rod 61 as an interlocking member is supported at the tip of 0. The movable rod 61 has a hole 57 and a through hole 5.
It is slidably inserted in the through hole 55 through the through hole 4 in the vertical direction. An E-shaped retaining metal fitting 62 is attached near the center of the movable rod 61. The retaining metal fitting 62 is brought into contact with the upper surface of the cover plate 56 and the lower surface of the support body 50, so that the movable rod 61 is prevented from coming off from the insertion hole 55 and the removal hole 57 along the axial direction thereof. . In addition,
The micro switch 59 and the movable rod 61 constitute a detecting means.

The upper end of the movable rod 61 is capable of projecting and retracting from the upper surface of the support body 50, and at the closed position of the lid 15, a protrusion 63 formed on the back surface of the lid 15 resists the biasing force of the actuator 60. And is pushed into the insertion hole 55. By this pushing, the micro switch 59 causes the actuator 6
Turned on through 0. Further, when the lid 15 is in the open position, it is projected from the upper surface of the support body 50 by the biasing force of the actuator 60. At this time, the micro switch 59 is turned off.

A central processing unit (hereinafter, abbreviated as CPU) 64 is connected to the micro switch 59, and an alarm light 65 provided on an operation panel (not shown), a dialysis component such as the motor 31 and a dialysis device are initialized. A reset button (not shown) for setting and a dialysis start button (not shown) for starting dialysis are connected. The CPU 64 turns on the warning light 65 when the micro switch 59 is off.
That is, it is possible to confirm whether the lid 15 is in the closed position or the open position by turning on the warning light 65. When a dialysis start button (not shown) connected to the CPU 64 is operated when the micro switch 59 is turned off, the CP
U64 does not drive the dialysis parts such as the motor 31.

Next, the operation and effect of the roller pump constructed as described above will be described in detail. First, a method of attaching / detaching the tube T to / from the roller pump will be described. Before attaching the tube T to the roller pump, the reset button provided on the operation panel of the dialysis machine (not shown) is operated to initialize the dialysis machine.

When the tube T is attached to the roller pump, the lid 15 is rotated from the closed position to the open position. Then, the side portion of the long hole 19 is pushed backward by the movable pin 21,
The stator 2 moves rearward. At this time, guide pin 1
1 is moved rearward along the guide groove 12, and the tip of the stator 2 is opened by this movement. That is, the distance between the stator 2, the roller 38, and the tube guide 40 is increased. Then, the tube T is arranged in the gap. At this time, the tube T is arranged between the upper protrusion 41 and the lower protrusion 42 and also in the receiving groove 10 of the tube receiving portion 5.

Then, when the lid 15 is rotated from the open position to the closed position, the pressing roller 18 rotates the pressing metal member 9 from the upper end to the lower end while pressing the metal fitting 9 forward along the rotational direction. While moving. By this pressing, the stator 2 is moved forward. At this time, the guide pin 11 is moved forward along the guide groove 12, and this movement closes the tip of the stator 2. That is, the interval between the stator 2, the roller 38, and the tube guide 40 is narrowed, and the tube T is pressed by the roller 38. This completes the tube installation.

Next, when the drive shaft 32 is rotated by driving the motor 31, the rotor 34 and the roller support 3 are
5 is rotated counterclockwise in FIG. By this rotation, each roller 38 alternately presses the tube T while rotating in the counterclockwise direction in FIG. 2, and the blood in the tube T is pumped.

As shown in FIG. 2, one roller 3
When 8 (lower right roller 38 in FIG. 2) presses the tube T, the roller support body 35 is swung in the direction approaching the rotor 34 side against the biasing force of the elastic projection 49. This swinging restricts the pressing force of the roller 38 against the tube T, and prevents the tube T from being subjected to an unnecessary load. The other roller 38 (the roller 3 on the upper left in FIG.
When 8) separates from the tube T, the roller support 35
Is oscillated in a direction away from the rotor 34 by the urging force of the elastic protrusion 49. Further, during rotation of the rotor 34, the tube guide 40 restricts the movement of the tube T in the vertical direction, and the pressing surface of the roller 38 against the tube T is stabilized.

On the contrary, when removing the tube T from the roller pump, the lid 15 is rotated from the closed position to the open position.
The gap between the stator 2, the roller 38, and the tube guide 40 is widened. And the tube T disposed in the gap
The tube T is removed from the roller pump by taking out.

Next, as described above, the tube T
A case where the tube T is attached to the roller pump and the tube T is disposed in the roller pump while being sandwiched between the tube guides 40 will be described.

First, the case where the tube T is sandwiched between the upper protrusions 41 of the tube guide 40 will be described. As shown in FIG. 1, when the tube T is sandwiched between the upper protrusions 41, the tube T is pressed by the tip of the upper protrusion 41. By this pressing, the tube T is deformed and its upper end rises to the same position as the upper surface of the arm 3 of the stator 2. When the lid 2 is rotated from the open position to the closed position in this state, the ridge portion 29 comes into contact with the upper end of the tube T immediately before the closed position. Due to this contact, the rotation of the lid 15 is restricted,
The lid 15 is no longer located in the closed position. At this time, the lid 15
Since the tip of the lid is located above the upper end surface of the support body 50, the protrusion 63 of the lid 15 does not contact the movable rod 61.

That is, since the lower end of the movable rod 61 is not moved downward by pressing the protrusion 63 downward, the actuator 60 of the micro switch 59 does not operate and the micro switch 59 remains in the off state. .
Then, when a dialysis start button (not shown) is operated, C
The PU 64 turns on the warning light 65 to notify that the tube T is sandwiched between the upper protrusions 41. With it,
The CPU 64 does not drive the motor 31. Therefore, the tube T is fixed to the upper protrusion 41 of the tube guide 40.
If the tube T is sandwiched between the two, the warning light 65 is turned on to inform the user that the tube T is not properly attached. At the same time, since the motor 31 is not driven, blood is not pumped through the tube T, and dialysis is not started.

Next, the case where the tube T is sandwiched between the lower protrusions 42 of the tube guide 40 will be described. As described above, when the tube T is sandwiched by the lower protrusions 42 when the lid 15 is rotated from the open position to the closed position after the tube T is disposed in the roller pump, the lower protrusions 42 are locked by the compression spring 44. Against the biasing force, the rotor 34 side (counter tube T
Side). At this time, the tip of the lower protrusion 42 is not housed in the housing cylinder 43, but is housed from the vicinity of the center to the base end. Further, unlike the case where the upper protrusion 41 sandwiches the tube T as described above, the lid 15 is located at the closed position. Therefore, the protrusion 63 of the lid 15
The movable rod 61 is moved downward by the
The microswitch 59 is turned on via 0.

In this state, when the motor 31 is driven by operating the dialysis start switch, the tip of the lower protrusion 42 rotates while sliding on the surface of the tube T. At this time,
Since the tip of the lower protrusion 42 projects from the tip of the housing cylinder 43, the tip of the housing cylinder 43 does not come into contact with the tube T. Therefore, the housing cylinder 43 does not damage the surface of the tube T. And the lower protrusion 42
Is positioned forward while rotating in the same direction together with the rotor 34, the tip end thereof is separated from the tube T. At the same time, the tip of the lower protrusion 42 is returned to the same position as the tip of the upper protrusion 41 by the biasing force of the compression spring 44.

Further, the lower protrusion 42 is formed together with the rotor 34.
Are rotated in the same direction so that the tips of the lower protrusions 42 approach the tube T. Then, the tips of the lower protrusions 42 have the substrate 1
The upper projection 41 is inserted between the lid 15 and the upper end of the tube T, while being intruded between the upper surface of the cover T and the lower end of the tube T. That is, the upper protrusion 41 and the lower protrusion 42
A tube T is located between the two, and the tube T rotates in the same direction as the rotor 34 while being guided by the protrusions 41 and 42.

Therefore, when the tube T is sandwiched by the upper protrusions 41 and attached to the roller pump,
The lower end of the protruding portion 29 is brought into contact with the upper end of the tube T so that the lid 1
5 was in the closed position. Then, the micro switch 59 detects whether the lid 15 is located at the closed position,
When it is not in the closed position, the indicator light 65 is used for confirmation. Therefore, before the start of dialysis, even if the tube T is sandwiched between the upper protrusion 41 and the stator 2, it can be detected and the motor 31 can be prevented from being driven. As a result, the tube T is reliably pressed only by the roller 38, so that the amount of blood pumped in the tube T can be reliably prevented from varying.

When the tube T is sandwiched by the lower protrusions 42 and attached to the roller pump, the lower protrusions 42 are provided so as to be movable toward the side opposite to the tube T against the biasing force of the compression spring 44. It was Therefore, the tube T can be prevented from being deformed due to the pressing of the lower protrusion 42. As a result, it is possible to reliably prevent the amount of blood pumped in the tube T from varying.

Further, since the tube T is held between the tube receiving portion 5 and the lower end of the pressing piece 30, the rotor 3
It is possible to prevent rattling in the vertical direction during the rotation of 4. Therefore, since the tube T can be always located at a fixed position in the axial direction of the roller 38, it is possible to reliably prevent the amount of blood pumped in the tube T from varying.

When the lid 15 is in the closed position,
The micro switch 59 is turned on by pressing the movable rod 61 downward. Therefore, it is possible to dispose the micro switch 59 at a position apart from the back surface of the lid without providing the micro switch 59 near the back surface of the lid 15. As a result, the micro switch 59 can be arranged at a position where it does not interfere with other members.

In addition, the tube T is sandwiched between the upper projection 41 and the stator 2, and even if the tube T is slightly deformed, the ring 27 can be reliably brought into contact with the upper end of the tube T. . Therefore, when the tube T is sandwiched between the upper protrusion 41 and the stator 2, the lid 15 can be reliably prevented from being located in the closed position.

The present invention can be embodied in the following other examples. (1) In the above-described embodiment, the arc-shaped recess is formed at the lower end of the pressing piece 30, and when the lid 15 is located at the closed position, the tube T is formed by the recess of the pressing piece 30 and the receiving groove 10 of the tube receiving portion 5. May be held. With such a configuration, it is possible to prevent the tube T from rattling in the vertical direction while the rotor 34 is rotating.

(2) In the above embodiment, the upper protrusion 41
When the tube T is sandwiched between the protrusions 29 and the movable rod 6,
1, the micro switch 59 and the like are used to detect whether the lid 15 is in the closed position or not. On the other hand, the protruding portion 29, the movable rod 61, the micro switch 5
9 may be omitted. Instead, the upper protrusion 41 may be configured to be movable to the side opposite to the tube T by using a compression spring 44 with the same configuration as the lower protrusion 42. With this configuration, the tube T can be attached when the tube T is attached.
It is possible to prevent the tube T from being deformed even if is caught by the upper protrusion 41.

(3) In the above embodiment, a pair of tube guides 40 are provided, but other than this, three or more tube guides 40 may be provided at equal intervals on the same circumference. (4) In the above embodiment, when the upper protrusion 41 sandwiches the tube T, the CPU 64 turns on the alarm light 65 to notify the user. In addition to this, a buzzer or a display device such as a liquid crystal may be connected to the CPU 64.

(5) In the above embodiment, the ribs 29 are formed in a ring shape, but they may be formed in a grid shape instead. With such a configuration, when the upper protrusion 41 sandwiches the tube T, the upper end of the deformed tube T is
It becomes easier to contact.

(6) In the above embodiment, the ridges 29 of the ring 27 are formed in an annular shape, but other than this, the ridges 29 may be formed in a lattice shape. With such a configuration, when the upper protrusion 41 sandwiches the tube T, it becomes easier to contact the upper end of the deformed tube T.

Although the respective embodiments of the present specification have been described above, technical ideas other than the claims which can be understood from the respective embodiments will be described below together with their effects. (A) In the invention described in claim 1, the tube receiving portion 5 for receiving the tube T is formed in a concave shape at the tip of the stator 2, and the lid 1 positioned above the tube receiving portion 5 is covered.
On the back surface of 5, a pressing member 30 for pressing the upper end of the tube T is provided.
The roller pump is characterized in that a tube T is inserted between the tube receiving portion 5 and the pressing member 30 and the tube T is sandwiched between the two 5, 30. With such a configuration, it is possible to prevent the tube T from rattling in the vertical direction.

(B) In the invention described in claim 2, the protrusion 27 is a roller pump having a ring shape. With such a configuration, the protrusion 27 is located along the arrangement of the tube T, so that the lid 15 is closed even if the tube T is sandwiched between the upper protrusion 41 and the stator 2 at an arbitrary position. It may not be in position.

In this specification, means and members relating to the constitution of the invention are defined as follows. (A) The compression spring 44 means a means for urging the lower protrusion 42 toward the tube T, and the compression type spring includes all springs such as a coil spring, a leaf spring, and a bamboo shoot spring. When viewed as a means, it also includes other elastic bodies such as air cushions and sponges.

[0056]

As described above in detail, according to the invention described in claim 1, even if the tube is arranged between the first projection or the second projection and the stator, the tube is deformed. It has an excellent effect that it can be prevented.

According to the second aspect of the invention, even if the first protrusion or the second protrusion is retracted during the rotation of the rotor, the housing portion does not contact the surface of the tube,
Since the tips of the protrusions come into contact with each other, it is possible to prevent the surface of the tube from being damaged.

[Brief description of drawings]

FIG. 1 is a partial vertical cross-sectional view of a roller pump embodying the present invention.

FIG. 2 is a plan view of the roller pump showing a state in which the stator is closed.

3 is a sectional view taken along line AA of FIG.

FIG. 4 is a plan view of the roller pump showing a state where the stator is opened.

FIG. 5 is likewise a front view of the roller pump.

FIG. 6 is a partially enlarged sectional view showing a tube guide of the same.

FIG. 7 is a perspective view showing the back surface of the lid.

FIG. 8 is a perspective view showing a roller support body.

FIG. 9 is a partial vertical cross-sectional view of a roller pump according to a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Substrate, 2 ... Stator, 34 ... Rotor, 40 ... Tube guide, 41 ... Upper protrusion (first protrusion), 42 ... Lower protrusion (second protrusion), 43 ... Storage tube (storage unit), 44 ...
Compression spring (biasing member), T ... tube,

Claims (2)

[Claims] 1. A stator (2) provided on a substrate (1) and capable of reciprocating in a direction parallel to a surface of the substrate (1), and provided on the substrate (1) located in the stator (2). ,
A rotating body (34) for pumping the liquid in the tube (T) while rotating the tube (T) arranged between the stator (2) and the rotating body (34). , A first protrusion (41) that is formed to project outward from the rotating body (34) and is located at a remote position with respect to the substrate (1), and a second protrusion that is located at a position close to the substrate (1). And a tube guide (40) for guiding the tube (T) disposed between the protrusions (41, 42) when the rotating body (34) rotates. In the roller pump, an accommodating portion (43) capable of accommodating a part of at least one of the first protrusion (41) and the second protrusion (42) in the rotating body (34). ) Are provided, and the protrusions (41, 42) are provided in the accommodation portion (43) by the tubes (T A biasing member (44) for biasing to the side is provided, and when the guides of both projections (41, 42) are incomplete, the biasing member (44) can be withdrawn toward the anti-tube (T) side against the elastic force of the biasing member (44). A roller pump characterized by the above. 2. The first protrusion (41) and the second protrusion (4)
Both of the tips of 2) are formed in an arc shape, and both protrusions (41,
42) When retracted when the guide is incomplete, both protrusions (4
The tip of each of the first and the second portions 42 is projected toward the tube (T) side with respect to the tip of the accommodation portion (43).
The roller pump described in.