JP2004169623A - Tube pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tube pump which is a structure of a pump capable of materializing safe and easy handling operation when mounting and removing a tube, wherein cleaning of the inside of a pump can be facilitated by removing a pump body while enabling regular and reverse rotation of a rotor. <P>SOLUTION: The guide protrusion 27a of a cylindrical hole 26 in a rotor 5 follows a spiral guide groove 4a of a driving shaft 4 so that the rotor 5 is accommodated in the fixed wall 9 in such a manner as to be rotated. The motor 3 is driven forward, which enables regular rotation of the rotor 5. With a lateral shaft 33 in a gripping knob 7 locked in a coupling groove formed by aligning the top end groove 28 of the driving shaft 4 and the top end groove 29 of a cylindrical part 25, the motor 3 is reversely driven, which enables reverse rotation of the roller 5. By displacing the gripping knob 7 upward, the rotor 5 can be removed upward from the driving shaft 4 of the motor 3 by the reverse rotation drive of the motor 3. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for circulating a bodily fluid or a replenisher such as an artificial dialysis device or a blood processing device through a system of an apparatus circuit, by rotating a rotor provided with a plurality of rollers on an outer periphery, and using any of the rollers to form a soft tube. The present invention relates to a tube pump configured to transport a liquid in a tube by compressing the tube.
[0002]
[Prior art]
Examples of the configuration of a tube pump used when flowing a body fluid or a replenisher such as an artificial dialysis device and a blood processing device into a system circuit system include a peripheral fixed wall and a motor driven at the center thereof. It has a rotor connected to a shaft and rotating, and several rollers disposed on the rotor. A tube in the circuit is inserted into a gap between the fixed wall and the roller, and the roller closes the tube with the roller. The liquid in the tube is transported by moving along the fixed wall while making the liquid.
[0003]
By the way, in the structure of the tube pump as described above, a gap for inserting the tube is provided between the fixed wall and the roller. There is a problem that a circuit tube having a margin for another circuit formed in the apparatus is caught in the gap and cut.
[0004]
For this reason, in the conventional tube pump, the upper part of the gap between the inner periphery of the fixed wall and the roller is covered with a slide-type or swing-type upper cover to prevent the gap from entering from the outside.
[0005]
However, when the top cover is opened when inserting or removing a tube, the opened top cover may protrude forward or move sideways from the device, obstructing medical work or contacting the operator. The upper cover was sometimes damaged.
[0006]
In order to solve such a problem, a structure in which the slide or swing type upper cover provided on the rotor of the tube pump is eliminated is desired. For this purpose, a structure for safely and easily handling the tube must be ensured.
[0007]
On the other hand, in a medical treatment apparatus, it is necessary to sanitarily remove contaminants that adhere to or be cultured on the structure of the apparatus or a hotbed such as dust or dust accumulated in the structure. It is desirable to have a structure that performs a sanitary treatment by performing care and cleaning and disinfection to prevent contact infection of bacteria by handling the device.
[0008]
Furthermore, in addition to transporting bodily fluids or replenisher fluids in one direction of the device circuit, performing the blood return procedure requires transporting the fluid in the tubes in the opposite direction, thus allowing reverse rotation of the rotor. A structure is required.
[0009]
[Problems to be solved by the invention]
The present invention has been made in view of the above circumstances, and abolishes the sliding or swinging upper cover provided on the rotor of the tube pump, while reducing the handling operation when mounting or removing the tube. The structure of the pump is performed safely and easily.Furthermore, the rotor can be rotated forward and reverse, and the rotor can be removed from the pump body to easily clean the inside of the pump, thereby improving the sanitary convenience. It is an object of the present invention to provide a tube pump that is secured.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a tube pump according to claim 1 of the present invention has a plurality of rollers disposed around a rotor which is removably inserted into a drive shaft of a motor provided in a pump body and rotates. A fixed wall for narrowing the soft tube is provided on the outer periphery of the circumferential track of each roller, and at least one roller is rotated while pressing the tube by the rotation of the rotor, so that the inside of the tube is rotated. In the tube pump for transferring a liquid, a guide circumferential groove for locking the soft tube is formed on an outer periphery of the rotor, and a cylindrical hole is formed in a cylindrical portion protruding from a central upper portion of the rotor in an axial direction. The rotor is rotated in the normal rotation direction by a guide projection formed on the inner periphery of the cylindrical hole to follow a spiral guide groove formed on the outer periphery of the drive shaft. While being housed in the fixed wall, a horizontal groove fixed in the handle is locked to a connecting groove formed by matching the upper end groove of the drive shaft with the upper end groove of the cylindrical portion. The motor is driven to rotate in the reverse direction so that the rotor can be rotated in the reverse direction, and the motor is reversely driven in a state where the horizontal axis of the knob is separated from the connection groove by pulling up the knob. Wherein the rotor can be detached upward from a drive shaft of the motor.
[0011]
Further, in the tube pump according to claim 2 of the present invention, in the structure according to claim 1, wherein the handle is fitted to the cylindrical portion, an outer peripheral groove formed to be vertically separated from an outer periphery of the cylindrical portion. An elastic ring is mounted between an inner peripheral groove formed on the inner periphery of the hand knob and an inner peripheral groove formed on the inner periphery of the hand knob. The positioning of the hand grip is performed by moving the outer peripheral groove and the lower peripheral groove to be fitted into any one of the outer peripheral grooves.
[0012]
A tube pump according to a third aspect of the present invention is characterized in that, in the first or second aspect, a cover that covers the rotor is provided on an outer periphery of the cylindrical portion.
[0013]
According to a fourth aspect of the present invention, there is provided a tube pump according to any one of the first to third aspects, wherein each roller supported by the rotor has room to move in a radial direction of the rotor, and is connected to each roller shaft. It is characterized by being displaced outward by the stopped elastic member.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
As shown in FIG. 1, the basic structure of the tube pump according to the present invention includes a plurality of parts (in this embodiment, a plurality of parts around a rotor 5 which rotates while being connected to a drive shaft 4 of a motor 3 provided in a pump body 2). Are provided), and a fixed wall 9 for narrowing the soft tube 8 is provided on the outer periphery of the circumferential track of each roller 6, and at least one roller 6 is driven by the rotation of the rotor 5. Is configured to transfer the liquid in the tube by rotating while compressing the tube 8.
[0016]
To describe such a structure in detail, as shown in FIG. 1, the rotor 5 is formed separately from the pump main body 2 and is detachable from the drive shaft 4 of the pump main body 2. That is, as shown in FIG. 2, the pump body 2 has a motor 3 fixed to a lower portion of a bottom plate 10 thereof, and a drive shaft 4 is fixed to a motor shaft 3 a protruding upward from a cylindrical hole 10 a of the bottom plate 10. A spiral guide groove 4 a is formed on the outer periphery of the drive shaft 4.
[0017]
Further, a fixed wall 9 having a predetermined height is formed on the pump body 2 along the outer periphery at a predetermined distance from the drive shaft 4. An inclined contact surface 11 is formed on the inner periphery of the upper end of the fixed wall 9.
[0018]
As shown in FIG. 1, guide passages 12 are formed in the pump body 2 outward from the circumferential fixed wall 9 in parallel with each other, and recesses 13 are formed in the guide passages 12 on both sides. (See FIGS. 5 and 6).
[0019]
Incidentally, the soft tube 8 is made of a synthetic resin tube such as vinyl chloride which can elastically recover the deformation caused by the pressing force (for example, the narrow pressure deformed portion 8a caused by the pressing of the roller 6 in FIG. 6). As shown, the diameter is larger than the circuit tube 14 and has a length reaching the guide passages 12 on both sides along the inner periphery of the fixed wall 9 of the pump body 2, and both ends are connected to the circuit tube 14. They are connected by the unit 15. When the rotor 16 rotates in both the forward and reverse directions by locking the flanges 16 formed on the respective connecting portions 15, 15 into the large-diameter concave portions 13 on the outlet sides formed in the respective guide passages 12. The flexible tube 8 is prevented from being pulled in the direction of the fixed wall 9.
[0020]
The rotor 5 is made of a metal body such as aluminum. Flanges 19, 19 are formed at upper and lower portions on opposite sides of a peripheral portion of the rotor 5, and a roller shaft , 17 are formed with shaft holes 18, 18 for supporting the upper and lower ends, and the flexible tube 8 is engaged with arc portions 20, 20 formed between the flanges 19, 19 forming the periphery of the rotor 5. A circumferential guide groove 21 for guiding is formed.
[0021]
By the way, the shaft holes 18, 18 for supporting the roller shaft 17 at the two upper and lower flanges 19, 19 respectively form an oval in the radial direction of the rotor 5, thereby moving the roller shaft 17 in the radial direction. There is room. Therefore, one end of the elastic member 22 formed by bending the elastic metal wire into a curved shape is bent and inserted into the holes 17a at the upper and lower ends of the roller shaft 17, and the other end of the elastic member 22 is bent. The roller shaft 17 can be urged outward in the radial direction of the rotor 5 by inserting and locking the portion into the hole 5 a formed on the opposite side of the rotor 5, and this pressing force is applied when the soft tube 8 is pressed. Can be buffered.
[0022]
In addition, as shown in FIG. 7, it is also possible to use an elastic member 23 different from the above. That is, the elastic members 23 shown in FIG. 7 are not provided one by one for each of the roller shafts 17 as described above, but the bent portions at both ends of one curved elastic member 23 are formed by the respective roller shafts. 17 and 17 are inserted into the respective holes 17a, 17a. In any case, the roller 6 is elastically urged outward in the radial direction of the rotor 5, and can repel a repulsive force when the soft tube 8 is pressed by each roller 6 as described later. It becomes possible.
[0023]
As shown in FIG. 1, a cylindrical portion 25 is protruded from the upper part of the center of the rotor 5, and a cylindrical hole 26 is formed in the cylindrical portion 25 in the axial direction so as to penetrate therethrough. The cylindrical hole 26 is inserted into the drive shaft 4 of the motor 3, and as shown in FIG. 2, a guide projection 27 a screwed from the outside to the inside with a screw 27 at the lower part of the rotor 5. Is projected from the inner periphery of the cylindrical hole 26, and the guide protrusion 27a follows the spiral guide groove 4a formed on the outer periphery 2 of the drive shaft 4, whereby the rotor 5 moves vertically while rotating. And do.
[0024]
On the other hand, as shown in FIG. 1, an upper end groove 28 formed at the upper end of the drive shaft 4 and an upper end groove 29 formed at the upper end of the cylindrical portion 25 of the rotor 5 inserted around the outer periphery of the drive shaft 4. Forms a continuous connecting groove with the same height and direction.
[0025]
As shown in FIG. 2, a hand knob 7 for fitting the cylindrical portion 25 from above is provided, and a horizontal shaft 30 is provided in both side holes 7 a formed on the upper portion of the hand knob 7. The horizontal axis 30 is exposed on the inner ceiling side of the hand knob 7.
[0026]
The horizontal shaft 30 can be deformed in the narrowing direction by leaving a gap in a rectangular elastic metal plate formed in a cylindrical joining portion, and can be deformed in the narrowing direction on both sides of the hand knob 7 at both ends of the horizontal shaft 30. The horizontal shaft 30 is prevented from being pulled out by inserting it in a squeezed shape and exerting an elastic restoring force at both ends.
[0027]
With such a configuration, when the horizontal knob 30 is fitted into a continuous groove in which the upper end groove 28 of the drive shaft 4 and the upper end groove 29 of the cylindrical portion 25 of the rotor 5 coincide with each other by pushing down the hand knob 7, The drive shaft 4 and the rotor 5 are connected to each other. In this state, the motor 5 is driven in reverse to rotate the rotor 5 in reverse. Further, by pulling up the handle 7 upward, the horizontal axis 30 of the handle 7 is disengaged from the connection groove (the upper end grooves 28, 29), and the motor 3 is driven to rotate in the reverse direction. Thus, the rotor 5 can be removed upward from the drive shaft 4 of the motor 3.
[0028]
Further, in a structure in which the hand knob 7 is fitted from above the cylindrical portion 25, the outer peripheral grooves 31 a and 31 b formed vertically separated from the outer periphery of the cylindrical portion 25 and the inner periphery of the hand knob 7. An elastic ring 33 is mounted between the inner ring 32 and the inner ring 32. The elastic ring 33 moves between the outer peripheral groove 31a above the cylindrical portion 25 and the outer peripheral groove 31b below the cylindrical portion 25 in accordance with the pulling or pushing operation of the hand knob 7. At this time, the inner peripheral groove 32 of the hand knob 7 accommodates a shape that expands when the elastic ring 33 moves up and down the cylindrical portion 25, and the elastic ring 33 fits into one of the outer peripheral grooves 31a, 31b. The hand knob 7 is positioned by being worn.
[0029]
The elastic ring 33 is formed by forming a steel wire into a small-diameter coil shape and has a ring shape. One of the outer peripheral grooves 31a and 31b of the handle 7 is elastically fastened. In the state.
[0030]
As shown in FIG. 1, a donut-shaped cover 35 is provided on the outer periphery of the cylindrical portion 25 of the rotor 5. The cover 35 is formed of transparent plastic, and as shown in FIG. 2, a large-diameter central hole 35a is formed in the center of a disk having an outer diameter corresponding to the contact surface 11 of the fixed wall 9 described above. . An O-ring 36 coated with sliding oil is fitted on the inner periphery of the center hole 35a of the cover, and a brim 35b is formed on the upper end of the outer periphery of the cover 35, and a rubber ring 37 is fitted on the lower end thereof. are doing.
[0031]
With such a configuration, when the rubber ring 37 abuts against the contact surface 11 of the fixed wall 9, the cover 35 slides on the outer periphery of the cylindrical portion 25 while rotating the rotor 5 by performing a braking action. Such a cover 35 closes a gap between the fixed wall 9 and the rollers 6, 6 to provide a safety structure in which a fingertip or another circuit tube does not enter the gap.
[0032]
Next, how to use and operate the tube pump configured as described above will be described. As shown in FIG. 2, the hand knob 7 is moved upward so that the upper outer circumferential groove 31 a of the cylindrical portion 25 and the inner circumferential groove 32 of the hand knob 7 are connected by an elastic ring 33, When the motor 3 is driven to rotate forward by inserting the cylindrical hole 26 of the drive shaft 5 into the drive shaft 4, the guide protrusion 27 a protruding from the inner periphery of the rotor 5 follows the guide groove 4 a of the drive shaft 4, thereby causing the rotor 5 to move. When the guide projection 27a descends to the end of the guide groove 4a of the drive shaft 4, it rotates at a fixed height.
[0033]
At this time, while the soft tube 8 is hung around the rotor 5 and locked in the guide circumferential groove 21, while the soft tube 8 is pushed between the roller 6 and the contact surface 11, the soft tube 8 As it rotates, it is sandwiched between the roller 6 and the fixed wall 9. Further, as shown in FIG. 3, as the rotor 5 descends, the soft tube 8 is sandwiched between the roller 6 and the fixed wall 9 in a crushed state. The height of 5 and the height of drive shaft 4 match.
[0034]
If the rotor 5 continues to rotate in this state, the liquid in the soft tube 8 can be transported by moving along the fixed wall 9 while creating a pressurized portion for the soft tube 8 with each roller 6. . Further, by changing the rotation speed of the motor 3, the transfer amount in the soft tube 8 can be adjusted.
[0035]
Then, as shown in FIG. 4, when the hand knob 7 is pushed downward, the lower outer circumferential groove 31 b of the cylindrical portion 25 and the inner circumferential groove 32 of the hand knob 7 are connected by an elastic ring 33. At this time, the horizontal shaft 30 in the handle 7 is fitted into a continuous groove having a shape in which the upper groove 28 of the drive shaft 4 and the upper groove 29 of the cylindrical portion 25 of the rotor 5 coincide with each other. The rotor 5 is connected. When the motor 3 is driven in the reverse direction in this state, the rotor 3 also rotates in the reverse direction via the drive shaft 4, and moves the press-closing portion around the respective rollers 6 with respect to the soft tube 8 in the reverse direction to thereby rotate the inside of the soft tube 8. Liquid can be sent back.
[0036]
Further, the hand knob 7 is shifted upward so that the upper outer peripheral groove 31a of the cylindrical portion 25 and the inner peripheral groove 32 of the hand knob 7 are connected by an elastic ring 33 as shown in FIG. Then, the horizontal shaft 30 in the handle 7 is detached from the upper end groove 28 of the drive shaft 4 and the upper end groove 29 of the cylindrical portion 25, whereby the connection between the drive shaft 4 and the rotor 5 is released.
[0037]
When the motor 3 is driven in the reverse direction in this state, the guide projection 27a in the cylinder 25 of the rotor 5 moves following the guide groove 4a of the drive shaft 4, so that the rotor 5 rises while rotating (shown in FIG. 2). State), the rotor 5 can be removed from the drive shaft 4.
[0038]
In this state, the tube 8 can be removed, and the rotor 5 can be pulled out from the drive shaft 4 by hand to remove it. The inside of the pump body 2 and the rotor 5 can be cleaned visually and disinfection material can be applied. Will be able to In addition, maintenance such as management and replacement of consumables can be easily performed, which is suitable for thorough hygiene management of a treatment apparatus required in recent years.
[0039]
【The invention's effect】
As described above, according to the tube pump of the present invention, the horizontal axis in the hand knob is fitted or disengaged from the upper end groove of the drive shaft and the upper end groove of the cylindrical portion by the vertical movement of the hand knob. By rotating the rotor forward or reverse by adjusting the position of the soft tube, the closed portion of the soft tube narrowed between the roller and the fixed wall is moved along the fixed wall, thereby allowing the rotor to rotate inside the soft tube. The liquid can be transported or reversed, and the amount of transfer in the flexible tube can be adjusted by changing the rotation speed of the motor.
[0040]
Further, in the present invention, the horizontal axis of the hand knob can be released from the connection groove by pulling the hand knob upward, and when the motor is driven in the reverse direction in this state, the rotor is inverted. The rotation raises the rotor, and the rotor can be removed from the drive shaft of the motor. In this state, the inside of the pump can be easily cleaned, disinfectant application processing and the like, and maintenance such as management and replacement of consumables can be easily performed. In terms of convenience.
[0041]
The operation to move the hand knob up and down as described above is performed with one touch, and an outer circumferential groove formed at a distance above and below the outer periphery of the cylindrical portion and an inner circumferential groove formed at an inner periphery of the hand knob. The elastic ring is attached between the two, and the elastic ring moves in the upper peripheral groove and the lower peripheral groove of the cylindrical part with the pulling up or down operation of the hand knob, and is fitted to either. This makes it easy to position the hand knob, and makes it possible to bring the drive shaft and the rotor into a connected state or to release this connected state.
[0042]
In addition, since the cover that covers the rotor is provided on the outer periphery of the cylindrical portion, it is not necessary to insert a finger between the fixed wall and the roller or to entangle other tubes, thereby ensuring operational safety. In addition, the operation of attaching and detaching the soft tube can be easily and reliably performed, and the device can be quickly adapted to clinical use.
[0043]
Further, since the above-described tube pump according to the present invention is not provided with a cover that slides and opens and closes on the rotor, the cover may be opened and protruded from the device as in the related art, or the cover may be damaged as in the related art. Absent. Further, since the occupied space when the cover is opened is not required, it is possible to achieve a rational arrangement of the tube pump and ease of operation.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a tube pump according to the present invention.
FIG. 2 is a longitudinal sectional view of a tube pump according to the present invention, showing a state where a rotor is moved upward.
FIG. 3 is a longitudinal sectional view of the tube pump according to the present invention, showing a state in which the rotor is housed in the fixed wall and the hand knob is pulled upward.
FIG. 4 is a longitudinal sectional view of the tube pump according to the present invention, showing a state in which the rotor is housed in the fixed wall and the hand knob is pushed down.
FIG. 5 is a side view of a tube pump according to the present invention.
FIG. 6 is a plan view of the tube pump according to the present invention, from which a hand knob is removed.
7 is a plan view of the tube pump according to the present invention, from which a hand knob is removed, and shows an example in which the tube pump is made of a member different from the elastic member shown in FIG. 6;
[Explanation of symbols]
2 Pump body 3 Motor 3a Motor shaft 4 Drive shaft 4a Guide groove 5 Rotor 5a Hole 6 Roller 7 Hand knob 7a Side hole 8 Soft tube 9 Fixed wall 10 Bottom plate 10a ... communication hole 11 ... contact surface 12 ... guide passage 13 ... recess 14 ... circuit tube 15 ... connecting part 16 ... flange 17 ... roller shaft 17a ... hole 18 ... shaft hole 19 ... flange 20 ... arc part 21 ... guide peripheral groove 22 , 23 elastic member 25 cylindrical part 26 cylindrical hole 27 guide projection 28 upper groove 29 upper groove 30 horizontal axis 31a upper outer groove 31b lower outer groove 32 upper inner groove 33 ... Elastic ring 35 ... Cover 35a ... Center hole 35b ... Flange 36 ... O-ring 37 ... Rubber ring

Claims (4)

A plurality of rollers are disposed around a rotor that is removably inserted into and rotated from a drive shaft of a motor provided in a pump body, and a fixed wall that narrows a soft tube around an outer circumference of a circumferential track of each roller. Is provided, in a tube pump for transferring the liquid in the tube by rotating the at least one roller while pressing the tube by the rotation drive of the rotor,
The rotor has a guide circumferential groove formed on the outer periphery thereof for locking the soft tube, and a cylindrical hole formed in a cylindrical portion protruding from the upper center of the rotor in an axial direction so as to penetrate therethrough. The rotor is rotated in the normal rotation direction by being guided by a helical guide groove formed on the outer periphery of the drive shaft, and is accommodated in the fixed wall. By driving the motor in the reverse direction with the lateral groove fixed in the hand knob locked in the connecting groove in which the upper end groove of the drive shaft coincides with the upper end groove of the cylindrical portion, The rotor can be rotated in the reverse direction, and the motor is rotated in the reverse direction with the horizontal axis of the knob pulled away from the connection groove by pulling up the knob to move the rotor in reverse. That it can be removed upward from the drive shaft Tube pump and butterflies. In the structure in which the hand knob is fitted to the cylindrical portion, an outer peripheral groove formed at an upper and lower part of an outer periphery of the cylindrical portion and an inner peripheral groove formed on an inner periphery of the hand knob are formed. An elastic ring is attached therebetween, and the elastic ring moves along an upper peripheral groove and a lower peripheral groove of the cylindrical portion along with the pull-up or push-down operation of the handle, and is fitted to either. 2. The tube pump according to claim 1, wherein the manual knob is positioned by performing the positioning. The tube cover according to claim 1, wherein a cover that covers the rotor is provided on an outer periphery of the cylindrical portion. 2. The roller according to claim 1, wherein each roller rotatably supported by the rotor has room to move in the radial direction of the rotor, and is outwardly biased by an elastic member locked on each roller shaft. 4. The tube pump according to 2, 3 or 4.

Images