JPH06142190A - Roller pump - Google Patents

Abstract

PURPOSE:To easily load/unload a tube by providing a stator to arrange the tube on a base expansibly. CONSTITUTION:Guide holes 5a, 5b provided in almost a chevron shape so as to be made narrower as advancing forward are formed on a base 1. Furthermore, the stator 10 provided so as to move forward/backward and consisting of a pair of arm parts 22b connected with each other expansibly is arranged at the base 1. An operating lever 6 which drives the stator 10 forward/backward is provided at the stator 10. Also, bolts 26a, 26b being slid along the guide holes 5a, 5b are mounted on the arm parts 22b. In other words, this pump is constructed in such a way that the stator 10 can be driven forward/backward by reciprocating the operating lever 6 between an open position and a closed position. and the arm parts 22b can be moved along the guide holes 5a, 5b.

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 circulating or supplying a liquid such as blood, dialysate and medicine.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 12, a roller pump 81 has a rotor 84 arranged in a circular storage recess 83 formed in a base 82 thereof. The rotor 84 is rotatably provided by a motor (not shown). Further, an arm 86 is rotatably supported by the rotor 84 via a pair of connecting projections 85, and the roller 8 is attached to the tip of the arm 86.
7 is rotatably supported by a pin 88. Further, the roller 87 is provided with a spring 88a for urging the arm 86, so that the tube 89 provided in the storage recess 83 is surely pressed to transfer the liquid in the tube 89.

At the tip of the tube 89, a pair of tube guides 90 for surely attaching the tube 89 into the housing recess 83 are provided. In addition, the tube guides 90 can be rotated, respectively.
The tube 89 is attached and detached in a state where the tube 89 is opened and rotated to a position indicated by a two-dot chain line.

That is, when the tube 89 is attached to the accommodating recess 83, the tube 89 is sandwiched between the accommodating recess 83 and the roller 87 with the tube guide 90 open. At this time, the tube 89 is inserted into the storage recess 83.
And the roller 87 are arranged in a pressed state.
Then, by returning the tube guide 90 to the original position (position in FIG. 12), the tube 89 is securely attached to the storage recess 83.

Similarly, when the tube 89 is removed from the storage recess 83, the tube 89 fixed to the storage recess 83 and the roller 87 is pulled out while the tube guide 90 is open. It has become.

[0006]

However, since the accommodating recess 83 for restricting the tube 89 from the outside is formed on the base 82, it cannot move relative to the base 82. The roller 87 is located very close to the storage recess 83, and when the tube 89 is attached to the storage recess 83, the roller 87 is moved along the storage recess 83.
There is a problem that the tube 89 has to be attached while being pressed. Further, there is a problem that this work is not easy for a worker and requires skill.

Similarly, when the tube 89 is removed, it is not easy to pull it out from between the storage recess 83 and the roller 87 while pressing the tube 89. At this time, for example, if the operator pulls the tube 89 without pulling it out and pulling it off, there is a problem that the rotor 84 may come off.

The present invention has been made to solve the above problems, and an object thereof is to easily attach and detach a tube by providing a stator for disposing the tube on a base so that the stator can be expanded. To provide a roller pump.

[0009]

In order to solve the above problems, the first aspect of the present invention is capable of expanding with a base having a guide groove provided in a substantially V shape so that the width becomes narrower toward the front. Connected to the base, and each of which has a slider that slides in the guide groove of the base, and is provided with a stator composed of a pair of arms that is provided to be movable back and forth with respect to the base, and a stator that is open to the base. An operating lever that is reciprocally supported between a position and a closed position, and that drives the stator in the front-rear direction to move the arm along the guide groove when reciprocating between the open position and the closed position; The gist of the present invention is that the rotor is provided inside the stator, is provided on the base, and is rotated by a motor to press and drive a tube arranged between the stator and the tube.

According to a second aspect of the present invention, in the first aspect of the present invention, a tube guide located between the tip ends of both arm portions of the stator is provided in a substantially T-shape with respect to the base, and both sides of the tube guide and when closed are provided. The gist is that the tube can be held between the arm portions of the stator.

[0011]

Therefore, according to the first aspect of the invention, when the operation lever is rotated from the closed position to the open position, the stator moves backward.
At this time, the slider formed on the stator moves backward in the guide groove of the base to expand the arm portion of the stator. Then, the gap between the stator and the rotor becomes wider, and the tube is arranged in the gap.

In this state, when the operation lever is turned from the open position to the closed position, the stator moves forward. At this time, the slider moves forward in the guide groove of the base to close the arm portion of the stator. Then, the gap between the stator and the rotor becomes narrow, and the tube is sandwiched between the stator and the rotor.

According to the second aspect of the invention, the tube guide is provided in a substantially T-shape between the tip ends of both arm portions of the stator with respect to the base. Therefore, when the operation lever is in the closed position, the tube is securely held between both sides of the tube guide and the arm of the stator.

[0014]

【Example】

(First Embodiment) A first embodiment in which the first and second inventions are embodied in a roller pump for circulating blood will be described below with reference to FIGS. In this embodiment, the left side is the front side and the right side is the rear side in FIGS.

As shown in FIG. 5, a pair of bearings 2 is formed at the base end of the base 1 of the roller pump. A circular bearing hole 3 is formed in a substantially central portion of the bearing 2.
A through hole 4 for inserting a shaft 30 of a motor 29, which will be described later, is formed in a substantially central portion of the base 1. In addition, a pair of guide holes 5a and 5b as guide grooves are formed in the front end portion of the base 1 in a direction of being separated from each other in a V shape from the front end portion to the rear end portion.

An operating lever 6 having a channel-shaped cross section is rotatably mounted by a pin 7 in the bearing hole 3 of the bearing 2. The base end of the operating lever 6 is formed in a channel shape deeper than the other portions, and pin holes 8 are formed on both sides of the operating lever 6 obliquely with respect to the longitudinal direction of the operating lever 6. Further, on both sides of the base end of the operating lever 6, semicircular engagement portions 9 are formed further in the longitudinal direction from the position where the shaft pin 7 is attached.

Further, a planar U-shaped stator 10 made of synthetic resin is provided on the upper surface of the base 1. A substantially quadrangular projection 11 is formed on the rear end of the stator 10 at the rear end. A long hole 12 extending in the front-rear direction is provided at a substantially central portion of the upper surface of the protrusion 11, the base end of which is opened forward, and the rear end of which is connected to the connecting portion 12a. A bolt 13 is inserted into the elongated hole 12 via a washer 14 and is screwed into the base 1. The stator 10 can be moved back and forth by a gap between the length of the elongated hole 12 and the bolt 13.
A pair of locking pieces 15 are formed at the rear end of the protrusion 11. The locking piece 15 is formed with a pin hole 16 extending upward in the drawing. At this time, the insertion pin 17 as a drive unit is inserted into the pin hole 16 and the pin hole 8.
The stator 10 and the operating lever 6 by inserting the
And are connected. E-rings 18 are attached to both ends of the insertion pin 17 so that the insertion pin 17 does not come off from the pin holes 8 and 16. Further, a pair of grooves 19 is formed on the upper surface of the base end portion of the stator 10.

2 and 4 show the closed position and the open position of the operating lever 6, respectively. When the operation lever 6 is rotated from the open position to the closed position, the engaging portion 9 of the operation lever 6
By pushing the outer side surface portion 20 of the base end portion of the stator 10, the stator 10 is moved forward. Then, as shown in FIGS. 1 and 2, at the closed position of the operation lever 6, both side end portions 21 of the operation lever 6 are engaged with the groove 19. Further, when the operation lever 6 is rotated from the closed position to the open position, the insertion pin 17 moves in the pin hole 8 of the operation lever 6 and the inner side surface of the pin hole 16 of the stator 10 is pushed backward. The stator 10 is moved backward.

Further, as shown in FIG. 5, the stator 10 is formed with a pair of arm portions 22a and 22b extending from the base end portion toward the tip end portion. The arm portions 22a and 22b are centered on the base end portion. The tip is provided so that it can be expanded. Protrusions 23a and 23b extending inside the stator 10 are formed at the tips of the arms 22a and 22b.
Locking portions 24 for locking the tubes 3a and 23b in a semi-circular shape from positions contacting the inner circumferences of the arm portions 22a and 22b.
a and 24b are provided. Further, the locking portion 24
Through holes 25a and 25b are formed inside a and 24b, respectively. Bolts 26a and 26b as sliders are inserted into the through holes 25a and 25b, and
The bolts 26a and 26b are further provided with the guide holes 5 of the base 1.
It is inserted through a and 5b. Then, the bolts 26a, 2
6b from the lower surface of the base 1 to prevent the guide holes 5a, 5b and the through holes 25a, 25b from coming off.
nuts 28a, 28b through the bolts 26a, 2
It is screwed to 6b. The bolts 26a and 26b are slidably provided along the guide holes 5a and 5b.

That is, when the stator 10 is moved forward,
For the arms 22a and 22b, the bolts 26a and 26b have guide holes 5
By moving along a and 5b, the base end is closed (see FIG. 3). Further, when the stator 10 is moved backward, the arms 22a and 22b move to the bolt 2
By moving 6a and 26b along the guide holes 5a and 5b, they are expanded around the base end portion (see FIG. 1).

As shown in FIGS. 1 and 2, a motor 29 is fixed to the lower surface of the base 1 of the roller pump, and a shaft 30 of the motor 29 is projected to the upper surface of the base 1 through the through hole 4. There is. A rotor 31 having a rectangular shape in plan view is fixed to the shaft 30, and the motor 29
It is designed to be driven by rotation. On both side surfaces of the rotor 31, connecting protrusions 32a, 32 having a rectangular shape in plan view are formed.
b are projected respectively. The connecting protrusions 32a, 32
The swing arms 33a and 33b are attached to the arm shafts 34a and 3b.
It is rotatably connected by 4b. Further, the swing arms 33a, 3
Springs 35a and 35b for urging 3b are provided respectively.

Roller shafts 36a and 36b are provided at the tips of the swing arms 33a and 33b to form rollers 37a and 37a.
b is pivotally supported. In addition, the swing arm 33
A pair of guide pieces 38a, 38b protruding in an orthogonal shape are provided on both sides of the side portions a, 33b in the lateral direction.

The rollers 37a and 37b and the guide pieces 38a and 38b are arranged in the stator 10. A tube 39 for circulating blood or the like is disposed between the rollers 37a, 37b and the guide pieces 38a, 38b and the stator 10 in a pressed state. The tip of the tube 39 is the stator 1.
It is engaged with the locking portions 24a and 24b formed in 0.

Further, a tube guide 40 for attaching the tube 39 to the stator 10 is provided at the tip of the base 1. As shown in FIG. 6, the tube guide 40 has a T-shape with a protrusion 41 projecting from the upper end thereof, and tapered portions 42a and 42b are formed on the bottom surface of the protrusion 41, respectively. ing. These taper portions 42a and 42b are locking portions 24a and 24b of the stator.
By pressing the tube 39 engaged with, the tube 39 is securely attached to the stator 10.

Further, as shown in FIG. 7, this tube 3
A connecting pipe 43 is connected to the tip portion of 9. The connecting pipe 43 is provided with the locking portions 24a, 24b and the tube guide 40.
It comes into contact with the surface of. That is, the tube 39 is positioned at a predetermined position by the connecting tube 43, and the tube 39 is fixed to the locking portions 24a, 24.
Has a stopper function to prevent it from coming off from b.

As described above, the roller pump drives the motor 29 while the tube 39 is securely attached to the stator 10. Then, the guide piece 38a,
38b guides the tube 39, and rollers 37a and 37b rotate while pressing the tube 39,
Blood or the like in the tube 39 is transferred.
Further, as shown in FIG. 3, in this roller pump, the tubes 39 are attached and detached by expanding the arms 22a and 22b of the stator 10.

Next, a method of attaching and detaching the tube of the roller pump constructed as described above will be described. First, as shown in FIGS. 2 and 4, when the tube 39 is attached to the roller pump, the operation lever 6 is rotated from the closed position to the open position. Then, the insertion pin 17 pushes the inner surface of the pin hole 16 of the stator 10 rearward, and the stator 10 moves backward. At this time, the bolts 26a and 26b attached to the front end of the stator 10 move in the guide holes 5a and 5b to expand the stator 10 around the base end. Then, the stator 11, the rollers 37a and 37b, and the guide piece 38
The gap between a and 38b becomes wider. The tube 3 is attached to the gap and the locking portions 24a and 24b of the stator 10.
9 is provided.

When the operating lever 6 is rotated from the open position to the closed position, the engaging portion 9 of the operating lever 6 pushes the outer side surface portion 20 of the stator 10 forward according to the rotation. Therefore, the stator 10 moves forward. Then, as shown in FIG. 1, the bolts 26a attached to the tip of the stator 10 are
26b moves in the guide holes 5a and 5b, and the stator 10
Is closed around the base end. At this time, the tube 39
Is pressed against the rollers 37a, 37b by narrowing the gap between the stator 10 and the rollers 37a, 37b and the guide pieces 38a, 38b. Further, as shown in FIG. 6, at the distal end portion of the tube 39, it is pressed by the tapered portions 42a and 42b of the tube guide 40, and the locking portions 24a and 24b and the tapered portions 42a and 42b.
It is securely attached by. At this time, as shown in FIG. 7, the connecting tube 43 attached to the distal end portion of the tube 39 abuts the surfaces of the locking portions 24a, 24b and the tapered portions 42a, 42b, thereby causing the tube 39 to move to a predetermined position. The tube 39 is positioned so that the tube 39 does not come off the stator.

In this state, the motor 29 rotates the rollers 37a and 37b to circulate the blood in the tube 39. Next, when removing the tube 39 from the roller pump, the operation lever 6 is rotated from the open position to the closed position, and the stator 10, the rollers 37a and 37b, and the guide piece 38 are rotated.
The gap between a and 38b is widened. At this time, the attached state of the tube 39 by the tapered portions 42a and 42b of the tube guide 40 is released. Then, the tube 39 is removed from the locking portions 24a and 24b, and the tube 39 is pulled out from the gap, whereby the stator 1
The tube 39 is removed from 0.

As described above, since the stator 10 is provided so as to be opened, the stator 10 can be attached and detached in order to attach and detach the tube 39.
And rollers 37a, 37b and guide pieces 38a, 38b
A sufficient gap can be created between and. Therefore, in particular, the tube 39 can be easily arranged in the gap without pressing the tube 39.

In order to open and close the stator 10 in order to attach and detach the tube 39, the operating lever 6 may be rotated between the open and closed positions. At this time, the operation lever 6 can be operated with a lighter force, and the tube 39 can be easily attached and detached.

Further, when the tube 39 is attached to the stator 10, the tube guide 40 presses the tube 39 when the stator 10 moves backward and closes, so that the tube 39 can be easily attached. it can. At this time, the connecting pipe 43 attached to the tip end portion of the tube 39 comes into contact with the surfaces of the stator 10 and the tube guide 40, so that the tube 39 can be attached at a predetermined position without displacement and slack.

Further, with this tube guide 40,
The tube 39 is reliably positioned at a predetermined position with respect to the stator 10. Therefore, for example, the rollers 37a,
It is possible to prevent the tube 39 from being bent or split at the pressing portion with the 37b.

(Second Embodiment) A second embodiment in which the first and second inventions are embodied in a roller pump for blood circulation will be described below with reference to FIGS. 8 and 10. The structure of the roller pump in the second embodiment is basically the same as that of the first embodiment, and the same members are designated by the same reference numerals and the description thereof will be omitted. Then, in the configuration of the roller pump, a stator and an operating lever, which are different in configuration, will be described in detail below.

As shown in FIGS. 8 and 10, a convex portion 44 extending rearward is formed at the base end portion of the base 1, and an operating lever 45 is rotated by a pin 46 on both side surfaces of the convex portion 44. Possibly pivoted. Further, the operation lever 45 is formed with a circular pin hole 47.

A synthetic resin stator 48 is arranged on the upper surface of the base 1. The stator 48 includes a pair of arm portions 49a and 49b formed from the base end portion toward the tip end portion.
Is formed into a U shape. This stator 48
A projecting portion 50 is provided at the base end portion, and a long hole 51 having a front end opened is provided at a substantially central portion of the upper portion of the projecting portion 50. A bolt 52 is inserted into the elongated hole 51 via a washer 53 and is screwed into the base 1. In addition, a pair of pin holes 54, which extend in the height direction and open downward, are formed on both side surfaces of the protrusion 50.

Then, the pin hole 54 formed in the stator 48 and the pin hole 47 formed in the operation lever 45.
The stator 48 and the operation lever 45 are connected by inserting the insertion pin 55 into Further, E-rings 56 are attached to both ends of the insertion pin 55 so that the insertion pin 55 does not come out from the respective pin holes 47 and 54.

That is, when the operation lever 45 is rotated from the open position to the closed position, the insertion pin 55 is moved to the stator 4.
By pushing the inner surface of the pin hole 54 of No. 8 forward, the stator 48 is moved forward. Further, when the operation lever 45 is rotated from the closed position to the open position, the insertion pin 55 pushes the inner surface of the pin hole 54 backward, thereby moving the stator 48 backward.

At this time, the stator 1 in the first embodiment is
Similarly to 0, bolts 26a and 26b are attached to the tip ends of the arm portions 49a and 49b, and the bolts 26a and 26b are attached.
Move within the guide holes 5a and 5b formed in the base 1 shown in FIG. That is, the operating lever 45
When the stator 48 moves backward, the arms 49a and 49b are expanded and the arms 48a and 49b are closed when the stator 48 moves forward.

Therefore, the insertion pin 55 pushes the inner surface of the pin hole 54 of the stator 48 forward or backward based on the rotation of the operation lever 45, whereby the insertion pin 55 is moved.
The stator 48 can be moved back and forth only by itself. At this time, since the stator 48 is moved back and forth only by the insertion pin 55, the structure can be simplified.

(Third Embodiment) A third embodiment in which the first invention is embodied in a roller pump for blood circulation will be described below with reference to FIGS. 9 and 11. In the third embodiment, the structure of the rotor or the like rotated by the motor is basically the same as that of the first embodiment, and the same members are designated by the same reference numerals and their description is omitted. To do.

As shown in FIGS. 9 and 11, a pair of bearings 58 is fixed to the base end of the base 57 of the roller pump. A circular bearing hole 59 is formed in a substantially central portion of the bearing 58. In addition, a pair of guide holes 60a and 60b as guide grooves are formed in the front end portion of the base 57 in the direction of being separated from each other in a V shape from the front end portion to the rear end portion.

An operating lever 61 having a channel-shaped cross section is rotatably attached to the bearing hole 59 of the bearing 58 by a pin 62. An E-ring 63 is attached to each of the pins 62 so that the operation lever 61 does not come off. Further, the base end of the operating lever 61 is formed in a channel shape deeper than other portions, and pin holes 64 are formed on both side portions thereof.

A U-shaped stator 65 made of aluminum die cast is arranged on the base 1. The stator 65 includes a pair of arm portions 6 extending from the base end portion to the tip end portion.
6a and 66b are formed, the arm portions 66a,
66b is provided so that it can be disassembled at the base end.

A U-shaped connecting member 67 is arranged at the base ends of the arms 66a and 66b so as to sandwich the base ends. A through hole 68 is formed in each of the base ends of the arms 66a and 66b, and a pair of through holes 69 are also formed in the tip of the connecting member 67. Then, the bolt 70 is inserted into the through holes 68 and 69, and the nut 71 is screwed from the lower portion of the bolt 70, whereby the connecting member 67 is attached to the base end portion of the stator 65. The arms 66a and 66b are provided so as to be able to spread around the bolt 70.

Further, pin holes 72 elongated in the height direction are inserted into both side surfaces of the base end portion of the connecting member 67.
Then, the operation lever 61 and the connecting member 67 are connected by inserting the insertion pin 73 into the pin hole 64 of the operation lever 61 and the pin hole 72.

That is, when the operation lever 61 is rotated from the open position to the closed position, the insertion pin 73 is moved by the connecting member 6.
The inner surface of the pin hole 72 of No. 7 is pushed forward, and the stator 65
To move forward. In addition, the operation lever 61
When the is rotated from the closed position to the open position, the insertion pin 73 pushes the inner surface of the connecting member 67 rearward, thereby moving the stator 65 backward.

Further, a pair of protrusions 7 extending inside the arm portions 66a and 66b are provided at the tips of the arm portions 66a and 66b.
4a and 74b are formed. And the protrusion 7
Cutout grooves 75a and 75b are formed on the upper surfaces of 4a and 74b, and a circular locking portion 76a for attaching the tube 39 for circulating blood is formed below the cutout grooves 75a and 75b. , 76b are formed. As shown in FIG. 9, the connecting pipe 43 is attached to the tip of the tube 39, and in the state where the tube 39 is attached to the stator 65, the connecting pipe 43 holds the engaging portion 76a,
It is adapted to come into contact with the front portion of 76b. That is, the tube 39 is positioned at a predetermined position by the connecting pipe 43, and the tube 39 is fixed to the locking portion 76.
It functions as a stopper so that it does not come off from a and 76b.

Further, bolts 77a and 77b as sliders are screwed onto the lower portions of the protrusions 74a and 74b, respectively. The bolts 77a and 77b are movably provided in the guide holes 60a and 60b provided in the base 57.

That is, when the stator 65 moves forward,
By moving the bolt 70 forward in the guide holes 60a, 60b, the arms 66a, 66b are closed around the bolt 70 inserted at the base end. Further, when the stator 65 moves backward, it moves rearward in the guide holes 66a, 66b, so that the arm portions 66a, 6 are centered around the bolt 70 inserted in the base end portion.
6b is expanded.

Next, a method of attaching and detaching the tube of the roller pump constructed as described above will be described. First, FIG.
As shown in, when attaching the tube 39 to the roller pump, the operation lever 61 is rotated from the closed position to the open position. Then, the insertion pin 73 pushes the inner surface of the pin hole 72 of the stator 65 rearward, and the stator 65 moves backward.
At this time, the bolt 77 attached to the tip of the stator 65
The a and 77b move in the guide holes 60a and 60b, and the stator 65 expands the arms 66a and 66b around the bolt 70. Then, the gaps between the rollers 37a, 37b and the guide pieces 38a, 38b attached to the rotor 31 and the stator 65 become wider. In this state, the tube 39 is arranged in the gap and the locking portion 76
The tube 39 is locked to a and 76b.

When the operating lever 61 is rotated from the open position to the closed position, the insertion pin 73 pushes the inner side surface of the pin hole 72 forward according to the rotation. Therefore, the stator 6
5 moves forward. Then, as shown in FIG.
5 Bolts 77a and 77b attached to the tip end of the guide hole 6
0a, 60b, the stator 65 moves the arm 6
6a and 66b are closed around the bolt 70. At this time, the tube 39 is connected to the stator 65 and the rollers 37a, 3a.
When the gap between 7b and the guide pieces 38a, 38b becomes narrower, the rollers 37a, 37b are pressed.

In this state, the motor 29 rotates the rollers 37a and 37b to circulate the blood in the tube 39. Next, when removing the tube 39 from the roller pump, the operation lever 61
Rotate from the closed position to the open position. Then, the stator 6
5 moves backward to expand the arms 66a and 66b around the bolt 70, and the stator 65 and the rollers 37a and 37a.
The gap between b and the guide pieces 38a, 38b is widened. In this state, attach the tube 39 to the locking portions 76a and 76b.
The tube 39 is removed from the stator 65 by removing the tube 39 from the stator 65 and removing the tube 39 from the gap.

As described above, since the stator 65 is provided so as to be able to be expanded, the stator 65 can be attached and detached to attach and detach the tube 39.
And rollers 37a, 37b and guide pieces 38a, 38b
A sufficient gap can be created between and. Therefore, in particular, the tube 39 can be easily arranged in the gap without pressing the tube 39.

In order to open and close the stator 65 in order to attach and detach the tube 39, the operation lever 61 may be rotated between the open and closed positions. At this time, the operation lever 61 can be operated with a lighter force, and the tube 39 can be easily attached and detached.

The tube 39 has arms 66a and 66b.
The locking portions 76a and 76b can securely lock. Further, the connecting pipe 43 of the tube 39 is locked by the locking portion 76.
The tube 39 can be reliably positioned at a predetermined position by contacting the front portions of the a and 76b.

The present invention is not limited to the above-described embodiments, but may be implemented as follows with a part of the configuration appropriately changed without departing from the spirit of the invention. (1) In the above embodiment, the roller pump for circulating blood is used, but the roller pump for circulating fluid such as dialysate and medicine is not limited to blood and may be any roller pump.

(2) In the above embodiment, the springs 35a and 35b for urging the swing arm may be leaf springs.

[0059]

As described above in detail, according to the present invention, the stator for disposing the tube is provided on the base so as to be expandable, so that the tube can be easily attached and detached.

[Brief description of drawings]

FIG. 1 is a plan view showing a state in which a stator of a roller pump according to a first embodiment of the present invention is closed.

FIG. 2 is a side view showing a state where the stator of the roller pump in the first embodiment is closed.

FIG. 3 is a plan view showing a state where the stator of the roller pump in the first embodiment is expanded.

FIG. 4 is a side view showing a state where the stator of the roller pump in the first embodiment is expanded.

FIG. 5 is an exploded perspective view showing a roller pump according to the first embodiment.

FIG. 6 is a front view showing a tube guide in the first embodiment.

FIG. 7 is a side view showing a connection terminal of a tube in the first embodiment.

FIG. 8 is a plan view showing a roller pump according to a second embodiment.

FIG. 9 is a plan view showing a roller pump according to a third embodiment.

FIG. 10 is an exploded perspective view showing a roller pump according to a second embodiment.

FIG. 11 is an exploded perspective view showing a roller pump according to a third embodiment.

FIG. 12 is a plan view showing a roller pump in a conventional example.

[Explanation of symbols]

1, 57 ... Base, 5a, 5b, 60a, 60b ... Guide holes as guide grooves 10, 48, 65 ... Stator, 22
a, 22b, 49a, 49b, 66a, 66b ... Arms,
26a, 26b, 77a, 77b ... Bolts as sliders, 29 ... Motor, 31 ... Rotor, 39 ... Tube,
6, 45, 61 ... Operation lever.

Claims (2)

[Claims] 1. A base having a guide groove formed in a substantially V shape so that the width becomes narrower toward the front, and the base is connected so as to be expandable with each other and slides with respect to the guide grooves of the base. A stator including a pair of arms that is provided with a slider and is movable back and forth with respect to the base; and a stator that is reciprocally supported between the open position and the closed position with respect to the base, and has an open position. An operation lever that drives the stator in the front-rear direction to move the arm along the guide groove when reciprocating between the closed positions; and a base provided inside the stator and rotated by a motor to rotate the stator. And a rotor for pressing and driving a tube arranged between the roller pump and the roller pump. 2. A tube guide, which is positioned between the tips of both arm portions of the stator, is provided in a substantially T-shape with respect to the base, and the tube is held between both sides of the tube guide and the arm portions of the stator when closed. The roller pump according to claim 1, which is made possible.