JP4660847B2 - Roller pump - Google Patents

Description

  The present invention relates to a roller pump used when a body fluid such as an artificial dialysis device or a blood treatment device or a replenisher is circulated in the path of the device circuit, and a tube can be mounted between the rotor and stator of this pump with one touch. The present invention relates to a roller pump.

  The basic configuration of the roller pump used when circulating body fluid or replenishment fluid such as an artificial dialysis machine and blood processing equipment to the path of the equipment circuit is the circumferential fixed wall that forms the stator, and the motor provided at the center And a plurality of rollers disposed on the rotor, and a tube in the circuit is inserted into the gap between the fixed wall and the roller, The liquid in the tube is transported by moving it along the fixed wall while creating a pressure-closed portion for the tube.

  Patent Document 1 is given as a conventional example of such a roller pump. In the roller pump of this document, as shown in FIG. 5 or FIG. 6, a rotor 50 is attached to a rotating shaft 53 of a motor 52 fixed to a support base 51. A plurality of rollers 55, 55... Are provided on the concentric circles at equal intervals between the plates 54a, 54b.

In addition, a stator 58 having a fixing wall 57 adapted to press the flexible tube T with at least two rollers 55 can be slid rearward along the support base 51, while a lid 63 covering the rotor 50 is provided as a stator. The support rotator 60 and the support base 51 are engaged with each other by a meshing mechanism. This meshing mechanism fixes one end of a toothed belt 61 meshing with a gear 60a provided on the outer periphery of the support rotator 60 to the support rotator 60 with a screw 62, and at the fixed position, the screw 63 displaces the lid 63 with the screw 62. While fixing the end, the other end of the toothed belt 61 is fixed to the stator 64 of the support base 51, and the stator 58 is interlocked with the rotation of the support rotating body 60 as the lid 63 is opened and closed. The robot moves in a direction away from or approaching the rotor 50.
Japanese Utility Model Publication No. 6-14482

  By the way, in the configuration of the above-mentioned Patent Document 1, when the flexible tube T is attached to or detached from the gap between the stator 58 and the rotor 50 of the roller pump, the support rotating body 60 is opened and closed when the lid 63 is opened and closed. The stator 58 moves rearward in conjunction with the rotation. For this reason, in order to accommodate the roller pump in the device circuit, a space S for moving the stator 58 behind the roller pump is required. However, a space for installing the roller pump in the device circuit that tends to be reduced in size is required. It is difficult to ensure the design.

  According to the present invention, the roller pump can be accommodated in the apparatus circuit without requiring a space behind the roller pump as described above, and the soft tube can be safely and securely attached, and hygiene such as washing can be performed. Another object of the present invention is to provide a roller pump improved in terms of surface.

In order to achieve the above object, the roller pump according to claim 1 of the present invention is detachably attached to a motor case provided at a lower portion of a pump body, a motor accommodated in the motor case, and a rotation shaft of the motor. A roller pump having a plurality of rollers rotatably provided around the rotor, and a stator having a fixed wall for narrowing the soft tube at the outer periphery of the circumferential track of each roller. In the roller pump that expands and contracts the gap between the rotor and the stator by pivotally supporting the motor on the motor case, a cover that covers the rotor is provided on the top of the pump body. A movable roller is rotatably accommodated by a pivot in a space inside a cover mounting portion provided at a rear portion of the pump body, and the cover is disposed on the outer periphery of the movable roller. By fixing the end, the movable roller rotates in accordance with the opening and closing operation of the cover, and a guide belt having one end fixed to the outer periphery of the movable roller is driven by the rotation of the movable roller, and the guide belt is connected to the cover mounting portion. The other end of the guide belt is fixed to the upper portion of the motor, and the cover is opened and closed as the guide belt. An operation of opening the cover by using a material that has a spring property that can push and pull the motor in accordance with the operation, and that does not cause stretching so that an error does not occur in the operation angle of the motor. A direction in which the rotor widens a gap with the stator when the guide belt pushes the motor to follow and the motor tilts. While moving to form a space for mounting a soft tube, the motor is raised by the guide belt pulling the motor following the operation of closing the cover, so that the rotor is in contact with the stator. The soft tube mounted between the rotor and the stator is narrowed by moving in the direction of narrowing the gap.

  As described above, in the roller pump of the present invention, the end of the guide belt fixed to the movable roller that pivotally supports the motor on the motor case and rotates according to the opening and closing of the cover that covers the top of the rotor. By connecting the motor to the motor, the motor is tilted via the guide belt following the opening operation of the cover, thereby widening the gap between the rotor and the stator. On the other hand, the motor is erected via the guide belt following the operation of closing the cover, so that the gap between the rotor and the stator can be narrowed and the attached soft tube can be narrowed.

  In such a configuration, in the case of the conventional device, the stator is moved rearward so as to widen the gap between the rotor and the stator, but according to the present invention, the stator has a fixed structure, By moving the rotor by tilting the motor, the gap between the rotor and the stator is widened.

  In addition, since the tilting of the motor is automatically performed as the cover is opened and closed, the rotor can be moved manually without requiring power. In addition, since a hook made of a leaf spring standing at the front end of the pump body is provided, the end of the closed cover is locked to the top of the rotor with a hook so that the roller pump can be rotated during use. Therefore, it is possible to achieve a structure with excellent safety.

  In addition, since the roller pump having such a structure does not change the overall outer shape, a space for moving the stator behind the roller pump is not required as in the conventional device, and this roller pump is installed in a housing such as an artificial dialysis device or a blood treatment device. When it is attached to the body, it can be installed in a narrow space, which is also beneficial for downsizing the device.

  Further, in the roller pump of the present invention, when the cover is opened, the rotor is manually detachable from the rotating shaft of the motor, so that the rotor is pulled out from the rotating shaft of the motor by lifting it up with a hand. be able to. Therefore, when cleaning, the inside of the pump body from which the rotor is removed is wiped off, and the removed rotor can be washed as it is, and can be easily cleaned or disinfected. It will be beneficial to you.

  Embodiments of the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the roller pump of this embodiment is in a state where the pump body 2 is attached to a housing 3 such as an artificial dialysis device or a blood treatment device, and the pump body 2 is exposed to the top of the housing 3. The motor case 4 provided at the lower part of the pump body 2 is housed in the housing 3.

  The roller pump will be described in detail. As shown in FIG. 2, the motor case 4 provided at the lower portion of the pump body 2 has both side plates 5 and 5 spaced apart from each other, and is provided at the lower portion of the motor 7. By locking both ends of the support shaft 6 in the locking holes 8, 8 at the bottom of the side plates 5, 5, the upper portion of the motor 7 can be rotated around the support shaft 6 as shown in FIG. With such a configuration, the motor 7 can be tilted back and forth about the support shaft 6 and returned to the original standing state.

  As shown in FIG. 3 or FIG. 4, an empty chamber 10 for accommodating the rotor 9 is provided inside the pump body 2, and the periphery of the empty chamber 10 is formed as a stator 12 having a fixed wall 11. ing. Locking grooves 14 and 14 for locking the connector 13 of the soft tube T are provided on both sides of the front portion of the stator 12. Since this locking groove 14 is shaped to fit the connector 13 by dropping the connector 13 from above, when the connector 13 is locked in the locking groove 14, it is fixed so as not to move in the front-rear direction. It becomes a state.

  Further, an insertion groove 15 into which the soft tube T is inserted is formed behind each locking groove 14, and each insertion groove 15 is opened toward the inside of the fixed wall 11 of the stator 12. In the middle of each such insertion groove 15, there is a small hole 16 drilled from the side, and the small hole 16 accommodates a ball 19 via a spring 18 whose end is fixed with a screw 17, When the ball 19 protrudes from the wall portion of the insertion groove 15, the side portion of the soft tube T inserted into the insertion groove 15 is locked, and acts as a retainer for the soft tube T.

  This soft tube T is connected to the middle of the circuit tube 20 via the connectors 13 and 13 on both sides, has a slightly larger diameter than the circuit tube 20 and has elasticity. The soft tube T is bent into a curved shape and attached along the fixed wall 11 of the stator 12.

  In FIG. 1 or FIG. 3, the rotating shaft 21 of the motor 7 projects upward in the center of the empty chamber 10 in the stator 12 with the rotor 9 facing upward, and the rotor 9 is attached to the rotating shaft 21. The rotor 9 is separated from the upper and lower parts of the central shaft part 22 and an upper disk 23 and a lower disk 24 are fixed, and the central shaft part 22 is interposed between the upper disk 23 and the lower disk 24. A plurality of (three in this embodiment) rollers 25, 25,...

  The central shaft 26 of each roller 25 is inserted into a shaft hole 27 (see FIG. 3) formed at equal intervals in the circumferential direction on the upper disk 23 and the lower disk 24 of the rotor 9. Each shaft hole 27 is formed in an ellipse that is slightly longer in the central axis direction of the rotor 9.

  In addition, a locking hole 28 is formed in a radial direction in the upper projecting portion of the support shaft 26 of the roller 25 inserted into each shaft hole 27, and one end of a U-shaped spring member 29 is formed in the locking hole 28. The other end of the spring member 29 is locked in a locking hole 30 in the radial direction of each roller 25 and beyond the central shaft portion 22 of the rotor 9.

  Therefore, the rotation of the support shaft 26 of the roller 25 is stopped by the U-shaped spring member 29, and only the roller 25 rotates around the support shaft 26. Further, since the roller 25 has an elastic force in the central axis direction along the oval shaft hole 27 by the U-shaped spring member 29, the roller 25 is pressed while adjusting the compression force when pressing the soft tube T. can do.

  As shown in FIG. 1, a shaft hole 31 into which the rotating shaft 21 of the motor 7 can be inserted up to a predetermined height is formed in the center of the central shaft portion 22 of the rotor 9. That is, the shaft hole 31 of the central shaft portion 22 of the rotor 9 has a concave shape formed from below to a predetermined height. When the shaft hole 31 of the rotor 9 is inserted into the rotating shaft 21 of the motor 7, the rotor 9 is Mounted in a stopped state at a height. Although not shown, the shaft hole 31 of the rotor 9 and the rotating shaft 21 of the motor 7 are fitted by a key, and when the motor 7 is driven, the rotor 9 rotates without slipping in the rotation direction. To do.

  With such a configuration, the rotor 9 can insert the central shaft hole 31 into the rotating shaft 21 of the motor 7 from above. Further, as the motor 7 rotates, the rotor 9 rotates the upper disk 23 and the lower disk 24 together with the central shaft part 22, and rotates each roller 25 around the central shaft part 22.

  Furthermore, the rotor 9 can be extracted from the rotating shaft 21 of the motor 7 by lifting it up with a hand. Therefore, at the time of cleaning, the inside of the empty chamber 10 of the pump body 2 from which the rotor 9 is removed can be wiped off, and the removed rotor 9 can be washed as it is.

  As shown in FIG. 1 or FIG. 3, a plurality of tube positioning guides 32 protruding in the circumferential direction between the rollers 25 and 25 from the central shaft portion 22 are provided immediately below the upper disk 23 of the rotor 9. Yes. The tube positioning guide 32 can hold the soft tube T mounted between the rotor 9 and the stator 12 so as to prevent the soft tube T from moving upward.

  On the other hand, as shown in FIG. 1, a cover 33 that covers the rotor 9 is provided on the top of the pump body 2. The cover 33 opens and closes around a movable roller 34 provided at the rear portion of the pump body 2. That is, as shown in FIG. 3, a cover mounting portion 35 having a width slightly reduced from both sides of the main body 2 is provided at the rear portion of the pump body 2, and a movable roller is provided in a space 35a provided inside the cover mounting portion 35. 34 is stored. The movable roller 34 is rotatable by pivots 36 and 36 that are pivotally supported by both parts of the cover mounting portion 35. As shown in FIG. 1, the rear end of the cover 33 is fixed to the side of the movable roller 34 with a screw 37 so that the movable roller 34 rotates according to the opening / closing operation of the cover 33.

  Further, the guide belt 38 is fixed to the outer periphery of the movable roller 34 by using the mounting screw 37 of the cover 33 in common. The guide belt 38 is extended along the outer periphery of a guide roller 39 rotatably supported at the lower portion of the cover mounting portion 35, and the guide belt 38 is further folded into a recess 40 provided at the upper portion of the motor 7. In addition to being extended while being bent, the end portion of the guide belt 38 is fixed to the recess 40 of the motor 7 with a screw 41.

  As the above-mentioned guide belt, it is desirable to use a metal leaf spring as shown in the figure, but a resin belt that does not expand and contract or a toothed belt with a core material may also be used. In any case, this guide belt has a spring property for pushing or pulling the motor following the operation of opening and closing the cover, and the operating angle of the motor (the angle when tilting or standing) A material that does not cause stretchability is necessary so that no error occurs.

  An elastic plate member 42 having a shape raised from the bottom of the pump body 2 is fixed to the front portion of the pump body 2, and is closed by a hook portion 43 formed on the upper portion of the elastic member 42. The front end of the cover 33 is locked so that the closed state of the cover 33 is maintained safely.

  With the above configuration, when the cover 33 is opened, the movable roller 34 rotates following the operation. When the guide belt 38 moves downward according to the rotation of the movable roller 34, the guide belt 38 operates to push the motor 7 forward (leftward in FIG. 1) along the outer periphery of the guide roller 39. As a result, since the motor 7 tilts forward about the support shaft 6, the rotor 9 mounted on the rotating shaft 21 of the motor 7 moves forward, and widens the gap with the stator 12 behind the flexible tube 9 Make T easy to wear.

  Further, when the motor 7 is erected through the guide belt 38 following the operation of closing the cover 33, the gap between the rotor 9 and the stator 12 is narrowed, and the soft tube T mounted as described above is narrowed. In this state, the rollers 25, 25,... Of the rotor 9 rotated by driving the motor 7 move the compression position against the soft tube T, whereby the liquid in the soft tube T can be transferred.

  The roller pump of the present invention has a structure in which the gap between the rotor and the stator is widened by tilting the motor by opening and closing the cover and moving the rotor by tilting the motor. It can be used as a roller pump that can be easily mounted and can be mounted in a narrow space.

It is a side view of the roller pump by this invention, Comprising: The inside is described in perspective. It is a rear view of the roller pump by this invention. It is a top view of the roller pump by this invention, and shows the state which opened the cover. It is a top view of the roller pump by this invention, and shows the state which closed the cover. It is a top view regarding the roller pump of patent document 1. It is a side view regarding the roller pump of patent document 1, and an upper part shows a cross section.

Explanation of symbols

2 ... Pump body 3 ... Housing 4 ... Motor case 5 ... Both side plates 6 ... Support shaft 7 ... Motor 8 ... Locking hole 9 ... Rotor
10 ... vacant
11 ... fixed wall
12 ... Stator
13 ... Connector
14 ... Locking groove
15 ... Insertion groove
16 ... small hole
17 ... screw
18 ... Spring
19 ... Ball
20 ... Circuit tube
21 ... Rotation axis
22… Center shaft
23… Upper disk
24… Lower disk
25 ... Laura
26 ... Center axis
27 ... Shaft hole
28 ... Locking hole
29… Spring member
30 ... Locking hole
31 ... Shaft hole
32 ... Tube positioning guide
33 ... Cover
34 ... Moveable roller
35… Cover mounting part
36 ... Axis
37 ... screw
38 ... Guide belt
39 ... Guide roller
40 ... recess
41 ... screw
42 ... Elastic plate member
43 ... Hook part
T ... Soft tube

Claims (1)

A motor case provided at a lower portion of the pump body, a motor housed in the motor case, a rotor which is detachably mounted on a rotation shaft of the motor, and a plurality of rotors which are rotatably provided around the rotor; A roller pump having a roller and a stator having a fixed wall for narrowing a soft tube at the outer periphery of a circumferential track of each roller, wherein the motor is rotatably supported on the motor case, In the roller pump that expands and contracts the gap with the stator ,
A cover that covers the rotor is provided on the top of the pump body,
A movable roller is rotatably accommodated by a pivot in a space inside a cover mounting portion provided at a rear portion of the pump body, and the cover is opened and closed by fixing the rear end of the cover to the outer periphery of the movable roller. And the guide belt having one end fixed to the outer periphery of the movable roller is driven by the rotation of the movable roller,
The guide belt is extended along the outer periphery of a guide roller pivotally supported at the lower portion of the cover mounting portion, and the other end of the guide belt is fixed to the upper portion of the motor.
The guide belt has a spring property capable of pushing and pulling the motor in accordance with an operation of opening and closing the cover, and a material which does not cause elasticity so that no error occurs in the operating angle of the motor. By using
When the guide belt pushes out the motor in accordance with the opening operation of the cover and the motor tilts, the rotor moves in the direction of widening the gap with the stator to attach the soft tube. While forming a space,
When the guide belt pulls the motor in accordance with the operation of closing the cover, the motor stands up, so that the rotor moves in a direction to narrow the gap between the stator and the rotor and the stator. A roller pump characterized in that the soft tube attached to the valve is narrowed.