JP2015222038A - Tube pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tube pump capable of suppressing a deterioration in a tube while inhibiting the tube from coming off a pump body.SOLUTION: A tube pump 1 includes a pump body 10 that accommodates a rotor 20 provided with a pushing part 23, and a tube 30 provided on the outer peripheral side of the rotor and sending out a fluid. The pump body has a source-side holding part 15 for inhibiting movement of a delivery source-side part 34 of the tube along a delivery direction, and has a structure that permits movement to a delivery-direction destination side of a delivery destination-side part 35 of the tube.

Description

  The present invention relates to a tube pump for delivering fluid.

  Conventionally, a rotating part (rotor) rotated by a driving part such as a motor is provided with a pressing part such as a pressure roller that presses the tube, and a fluid is sent out (transferred) by rotating the rotating body and moving the pressing part. ) Is known. For example, Patent Document 1 below discloses a tube pump in which a tube is provided along an inner peripheral surface of a cylindrical chamber and a pressure member that sequentially presses the tube is provided. Patent Document 2 below discloses a tube pump in which a plurality of elastic tubes are arranged so as to equally divide an inner peripheral surface of a pump case, and a plurality of pressure rollers that press these elastic tubes are provided. .

Japanese Patent Laid-Open No. 11-82324 Japanese Patent No. 3217518

  By the way, in the tube pump as described above, the pressing portion moves while crushing the tube, so that the tube is moved by the frictional resistance between each other, or depending on the tube material or the degree of compression, etc. It is considered that moves along with the pressing part. For this reason, in order to prevent the tube from coming out of the pump body, a holding portion for restraining and holding the joint of the tube at the delivery source side and the delivery destination side is provided at the tube withdrawal site of the pump body. Conceivable. However, if both end portions are constrained with respect to the pump body in this way, the tube is compressed and bent on the front side in the movement direction of the pressing portion toward the delivery side as the pressing portion moves toward the delivery side. It becomes easy to deteriorate and to deteriorate easily.

  This invention is made | formed in view of the said situation, and it aims at providing the tube pump which can suppress deterioration of a tube, suppressing the drop-off | omission of the tube from a pump main body.

  In order to achieve the above object, a tube pump according to the present invention includes a pump body that houses a rotating body provided with a pressing portion and a tube that is provided on the outer peripheral side of the rotating body and that delivers a fluid. The pump main body has a source side holding portion that suppresses movement of the tube at the delivery source side portion along the delivery direction, while allowing the movement of the delivery destination side portion of the tube toward the delivery direction destination side. It is characterized by.

  Since the tube pump according to the present invention has the above-described configuration, it is possible to suppress deterioration of the tube while suppressing the drop-off of the tube from the pump body.

It is a partially omitted schematic plan view schematically showing an example of a tube pump according to an embodiment of the present invention. (A) is a partially broken schematic plan view of the tube pump, and (b) is a schematic system configuration diagram schematically showing an example of a fluid delivery system incorporating the tube pump. (A) is a partially omitted schematic plan view of the tube pump, and (b) is a partially broken schematic exploded perspective view in which a part of the tube pump is omitted.

Embodiments of the present invention will be described below with reference to the drawings.
In some of the drawings, some of the detailed reference numerals attached to other drawings are omitted.
1-3 is a figure which shows typically an example of the tube pump which concerns on this embodiment.

As shown in FIG. 1, the tube pump 1 according to the present embodiment includes a rotating body 20 provided with a pressing portion 23, and a tube 30 that is provided on the outer peripheral side of the rotating body 20 and delivers a fluid. ing. The rotating body 20 is rotated by the drive unit 26 (see FIG. 2B). The tube pump 1 includes a pump body 10 that houses the rotating body 20 and the tube 30.
The tube pump 1 is configured to send (transfer) the fluid in the tube 30 by rotating the rotating body 20 to the delivery side (forward rotation) and moving the pressing portion 23. In FIG. 1, clockwise rotation is the reverse rotation of the rotating body 20 (rotation to the counter-feeding side), and counterclockwise rotation is the normal rotation of the rotating body 20.

  As shown in FIGS. 1 and 2A, the pump main body 10 has a source side holding portion 15 that suppresses movement along the delivery direction of the delivery source side portion 34 of the tube 30, while the delivery side of the tube 30. The structure allows the movement of the portion 35 toward the delivery direction side. With such a configuration, deterioration of the tube 30 can be suppressed while preventing the tube 30 from dropping from the pump body 10. That is, even when the tube 30 moves with the movement of the pressing portion 23 toward the delivery side and the counter-delivery side, the movement along the delivery direction of the delivery source side portion 34 of the tube 30 is suppressed by the former side holding portion 15. can do. Therefore, the tube 30 can be prevented from dropping from the pump body 10. Also, when the tube 30 moves as the pressing portion 23 moves to the delivery side, the delivery destination side portion 35 of the tube 30 is moved to the delivery direction destination side as shown in FIG. Can be made. Thereby, it is possible to prevent the tube 30 from being compressed and bent on the front side in the moving direction of the pressing portion 23 that moves to the delivery side, and it is possible to suppress deterioration of the tube 30.

  Further, in the present embodiment, a portion of the pump body 10 in the delivery destination side portion 35 of the tube 30 to the outside of the pump body 10 abuts on a contact portion 35a provided in the delivery destination side portion 35 of the tube 30, A stopper portion 17 is provided to prevent the contact portion 35a from moving toward the original side in the sending direction. With such a configuration, the delivery destination side portion 35 of the tube 30 is drawn into the pump body 10 even when the rotating body 20 is rotated in the reverse direction and the pressing portion 23 moves to the opposite delivery side. Can be deterred.

  In the present embodiment, the first flange portion 35a and the second flange portion 35b constituting the contact portion are provided in the delivery destination side portion 35 of the tube 30 with an interval in the delivery direction. Moreover, the stopper part of the pump main body 10 is made into a pair of protrusions (stopper protrusions) 17 and 17 protruding in a direction facing each other from both inner side walls formed so as to sandwich the delivery destination side portion 35 of the tube 30. . Further, the dimension (projection width dimension) W2 along the delivery direction of the stopper projections 17 and 17 is set to the dimension (inter-flange dimension) W1 along the delivery direction between the first flange part 35a and the second flange part 35b. Is greater than. With such a configuration, the first flange portion 35a of the tube 30 can be received by the pair of stopper protrusions 17 and 17 of the pump body 10, so that the inside of the pump body 10 of the delivery destination side portion 35 of the tube 30 can be obtained. Can be stably deterred. Moreover, since the protrusion width dimension W2 of the stopper protrusions 17 and 17 is made larger than the flange-to-flange dimension W1, when the tube 30 is assembled, the pair of stopper protrusions 17 are erroneously interposed between the flange parts 35a and 35b. , 17 can be prevented from being inserted. That is, it is possible to prevent the movement of the delivery destination side portion 35 of the tube 30 toward the delivery direction destination side.

  In the present embodiment, similarly to the delivery destination side portion 35, the delivery source side portion 34 of the tube 30 is provided with the first flange portion 34a and the second flange portion 34b. The delivery destination side portion 35 is made of the same joint component. With such a configuration, the structure can be simplified. Moreover, in this embodiment, a pair of holding projections 15 projecting in a direction facing each other from the inner side walls formed so as to sandwich the delivery source side portion 34 of the tube 30 as the original holding unit of the pump body 10. 15 and so on. In addition, the pair of holding projections 15 and 15 are inserted between the flange portions 34a and 34b of the delivery source side portion 34 to prevent movement of the delivery source side portion 34 along the delivery direction. With such a configuration, the movement of the delivery source side portion 34 of the tube 30 in the delivery direction can be stably suppressed.

  In the present embodiment, the rotating body 20 is provided with a plurality of pressing portions 23, 23 spaced apart in the rotational direction. In addition, the pump body 10 is provided with an inner peripheral wall surface 13 in which the tube 30 is arranged in an arc shape with the rotation centers 21 and 21A of the rotator 20 being the center of the circle (see also FIG. 3). Further, in the pump body 10, a state in which all of the plurality of pressing portions 23, 23 press the tube 30 as the rotating body 20 rotates, and one of the plurality of pressing portions 23, 23 is positioned at the interrupted portion of the tube 30. An inner peripheral wall surface 13 is provided so as to displace the state to be performed. Further, the radii R1, R2, and R3 of the inner peripheral wall surface 13 are different in the circumferential direction so that the compressibility of the tube 30 by the pressing portions 23 and 23 is substantially constant over the entire circumferential direction of the inner peripheral wall surface 13. It is With such a configuration, the compressibility of the tube 30 by the pressing portions 23, 23 can be made uniform in the tube longitudinal direction. That is, in any of the state where all of the plurality of pressing portions 23, 23 press the tube 30, and the state where one of the plurality of pressing portions 23, 23 is located in the interrupted portion of the tube 30, The compression ratio of the tube 30 by 23 can be made substantially constant. In other words, between the components such as the shaft portion 21 (21A) serving as the rotation center of the rotating body 20 and the bearing portion 19 (12) of the pump body 10, due to a gap for fitting, tolerance (dimensional tolerance), and the like. Clearance (gap) in the direction along the radial direction of the rotating body is generated. It is possible to absorb a deviation toward the discontinuity portion in a state where one of the plurality of pressing portions 23, 23 caused by such clearance is located at the discontinuity portion of the tube 30 by the diameter difference of the inner peripheral wall surface 13. it can. Thereby, generation | occurrence | production of the delivery failure etc. by the overload to the tube 30 or insufficient compression can be suppressed.

  Further, in the present embodiment, the rotating body 20 is configured such that the two pressing portions 23 and 23 are provided at equal intervals in the rotation direction. In addition, the inner peripheral wall surface 13 of the pump body 10 is configured such that the tubes 30 are arranged in a series with an arc shape larger than a semicircle, and the radius R1 of the opposite side portion 13a of the discontinuity portion of the tube 30 on the inner peripheral wall surface 13 is set. Is made smaller than the other parts 13b and 13c. In other words, if one of the two pressing portions 23, 23 is located at the discontinuous portion, the other pressing portion 23 is located at the opposite side portion 13 a of the discontinuous portion, and the other pressing portion 23. The restoring force of the tube 30 acts on the rotating body 20 and the rotating body 20 is shifted to the interrupted portion side. Even in such a case, the radius R1 of the opposite side portion 13a of the interrupted portion is reduced, so that the compression rate of the tube 30 in the portion 13a is suppressed from becoming smaller than the other portions 13b and 13c. can do. Thereby, the compression ratio of the tube 30 by the press parts 23 and 23 can be equalized in the tube longitudinal direction with a simple configuration.

  In the present embodiment, the radius R2 is gradually varied along the circumferential direction so that the inner peripheral wall surface 13 has a series of concave curved surface shapes. With such a configuration, the movement of the pressing portions 23 and 23 accompanying the rotation of the rotating body 20 is smoother than that in which the inner peripheral wall surface is provided with a step, a bent corner portion, or the like so as to make the radius different in the circumferential direction. Thus, deterioration and damage of the tube 30 can be suppressed.

Hereinafter, an example of a specific configuration of the tube pump 1 according to the present embodiment will be described.
In the present embodiment, the tube pump 1 is configured such that a single rotating body 20 and a single tube 30 are accommodated in the pump body 10.
As shown in FIG. 3 (b), the pump main body 10 includes a main body case 11 provided with a housing recess that opens in one direction of the axis (shaft portion 21) of the rotating body 20, and an opening of the main body case 11. And a lid 18 provided so as to cover the side.
The lid body 18 is provided with a bearing portion 19 that is provided so as to protrude in one axial direction of the rotator 20 and that receives a shaft portion 21 that serves as a rotation center of the rotator 20. The main body case 11 is provided with a shaft portion 12 that is provided so as to be recessed in the other axial direction of the rotating body 20 and is inserted into a bearing portion 21 </ b> A serving as a rotation center of the rotating body 20.

An inner peripheral wall surface 13 along which the tube 30 is bent is provided in the main body case 11. This inner peripheral wall surface 13 may also be provided on the lid 18. That is, the inner peripheral wall surface 13 may be formed by the main body case 11 and the lid body 18 joined in the axial direction of the rotating body 20.
In the illustrated example, the inner peripheral wall surface 13 has an arc shape with a central angle of about 220 degrees when viewed in the axial direction. As shown in FIG. 1, the portion of the inner peripheral wall surface 13 that faces the central portion in the circumferential direction becomes a drawing-out side of the tube 30 to the outside of the pump body 10, and the tube 30 that is not lined with the tube 30 is interrupted. Part.
In the present embodiment, as shown in FIG. 3 (a), the inner wall surface 13 has a depth as a radius from the circle center (shaft portion 21) of the inner wall surface 13a that is the opposite side portion of the discontinuity portion of the tube 30. The side radius R1 is made smaller than the radii R2 and R3 of the other portions 13b and 13c. The rear side wall surface 13a is formed in an arc shape in which the center in the circumferential direction coincides with the center in the circumferential direction of the inner peripheral wall surface 13, and the center angle is about 90 degrees in the illustrated example. The back side radius R1 of the back side wall surface 13a has the same diameter over the entire circumferential direction of the back side wall surface 13a.

Further, on the both sides in the circumferential direction of the rear side wall surface 13a, gradually increasing wall surfaces 13b and 13b are provided so that the respective radii R2 and R2 gradually increase from the rear side wall surface 13a toward the discontinuous portion side of the tube 30. ing. That is, the gradually increasing wall surfaces 13b and 13b on both sides are formed such that the radii R2 and R2 from the center (shaft portion 21) gradually increase as the distance from the circumferential center of the inner peripheral wall surface 13 increases.
In the illustrated example, the gradually increasing wall surfaces 13b and 13b are provided from both sides of the back wall surface 13a to a portion where the central angle of the inner peripheral wall surface 13 is about 180 degrees. That is, in the illustrated example, an example is shown in which gradually increasing wall surfaces 13b and 13b each having an arc shape with a central angle of about 45 degrees are provided on both sides of the back side wall surface 13a. The state in which any one of the pressing portions 23 is positioned so as to face the rear wall surface side portion of the gradually increasing wall surfaces 13 b and 13 b and the rear wall surface 13 a is that one of the plurality of pressing portions 23 and 23 is interrupted by the tube 30. It will be in the state located in the part. In this state, the rotating body 20 is likely to be displaced to the discontinuous portion side due to the clearance or the like.

In addition, on the opposite side wall surface side of the gradually increasing wall surfaces 13b, 13b on both sides, drawer side wall surfaces 13c, 13c serving as a portion on the drawer side of the tube 30 are provided so as to be continuous with each other.
These drawing side wall surfaces 13c and 13c are each formed in a circular arc shape having a central angle of about 20 degrees in the illustrated example. Also. The drawing side radii R3 and R3 as the radii from the circle centers (shaft portions 21) of the drawing side wall surfaces 13c and 13c have the same diameter over the entire circumferential direction of the drawing side wall surfaces 13c and 13c. The state in which the pressing portions 23 and 23 are positioned so as to face the drawer side portions of the drawer side wall surfaces 13c and 13c and the gradually increasing wall surfaces 13b and 13b is a state in which all of the plurality of pressing portions 23 and 23 press the tube 30. Become. In this state, since the restoring force of the tube 30 acts on the pressing portions 23 and 23 in the same manner, the radial displacement of the rotating body 20 is unlikely to occur.
In addition, the drawn side wall surfaces 13c and 13c on both sides, the gradually increasing wall surfaces 13b and 13b, and the back side wall surface 13a on both sides are formed in a series of concave curved surface shapes so that a step or a bent portion is not formed between adjacent wall surfaces. Yes.

The dimensional difference (diameter difference) between the drawing-side radii R3, R3 and the back-side radius R1 is such that the compressibility of the tube 30 by the pressing portions 23, 23 is substantially constant over the entire circumferential direction of the inner peripheral wall surface 13. Thus, it may be set as appropriate. The diameter difference is appropriately set according to the clearance and the like along the radial direction between the bearing portion 19 (shaft portion 12) of the pump body 10 and the shaft portion 21 (bearing portion 21A) of the rotating body 20. It may be. In other words, the above-mentioned diameter difference takes into account the deviation of the rotating body 20 due to the above-mentioned clearance and the like, and the dimension along the radial direction between the inner peripheral wall surface 13 and the pressing portions 23 and 23 of the rotating body 20 is the circumferential direction. It may be set as appropriate so as to be substantially constant over the whole.
Moreover, the dimension along the circumferential direction of the above-mentioned back side wall surface 13a is good also as a dimension according to the dimension along the circumferential direction of the discontinuous part of the tube 30 in general. In other words, the dimension along the circumferential direction of the back side wall surface 13 a is set such that one of the plurality of pressing portions 23, 23 is positioned at a discontinuous portion of the tube 30 as the rotating body 20 rotates. It is good also as a dimension according to the dimension which moves the range where the restoring force from is difficult to act. Further, the degree of gradual change in dimensions and diameter along the circumferential direction of the gradually increasing wall surfaces 13b, 13b on both sides also takes into account the magnitude of the restoring force received from the tube 30 by the pressing portion 23 that moves as the rotating body 20 rotates. It may be set as appropriate. Moreover, the dimension along the circumferential direction of the drawer side wall surfaces 13c, 13c on both sides is a position where all of the plurality of pressing portions 23, 23 press the tube 30 as the rotating body 20 rotates, and the pressing portions 23, 23 It is good also as a dimension according to the dimension which moves the range where the restoring force from the tube 30 acts similarly.

In addition, the pump body 10 (main body case 11) passes through the side portion of the inner peripheral wall surface 13 facing the central portion in the circumferential direction so as to penetrate the source side portion 34 and the destination side portion 35 of the tube 30. Are inserted through each of the insertion portions 14 and 16. These insertion parts 14 and 16 are provided so as to be connected to the opposite side wall surface side of the extraction side wall surfaces 13c and 13c of the inner peripheral wall surface 13 described above. These insertion portions 14 and 16 are partitioned by both inner side walls, a bottom wall, and a lid body 18 formed in the main body case 11 so as to sandwich the sending side part 34 and the sending side part 35 of the tube 30 respectively. Yes.
The pair of holding projections 15 and 15 and the pair of stopper projections 17 and 17 are formed so as to narrow the dimension between the inner side walls of the insertion portions 14 and 16. The holding protrusion 15 and the stopper protrusion 17 may be provided on the bottom wall or the lid 18 of the main body case 11 in addition to or instead of the inner walls of the insertion portions 14 and 16 of the main body case 11. Good. That is, you may make it grasp | ascertain the bottom wall of the main body case 11 and the cover body 18 as both inner side walls of the extraction | drawer site | part of the tube 30 in the pump main body 10. FIG.

The pair of holding projections 15, 15 provided in the insertion part 14 on the sending side is provided on the outer opening edge of the insertion part 14 on the sending side. The dimension (projection width dimension) along the delivery direction (tube longitudinal direction) of the holding projections 15 and 15 is such that the first flange portion 34 a and the second flange of the delivery source side joint 34 as the delivery source side portion of the tube 30. It is made smaller than the dimension (dimension between flanges) along the sending direction between the part 34b. The protrusion width dimensions of the holding protrusions 15, 15 may be set to appropriate dimensions so that the holding protrusions 15, 15 can be inserted between the flange parts 34 a, 34 b of the sending side joint 34. Further, the projecting dimensions of the holding projections 15, 15, that is, the dimension between the front end surfaces in the projecting direction of the holding projections 15, 15 is between the flanges 34 a and 34 b of the sending side joint 34. What is necessary is just to set it as an appropriate dimension so that insertion of a site | part is possible. Further, the dimension between the front end surfaces in the protruding direction of the holding projections 15 and 15 may be smaller than the outer diameter of each flange portion 34a and 34b of the sending side joint 34.
These holding projections 15 and 15 are inserted between the flange portions 34a and 34b of the delivery source side joint 34 of the tube 30, and movement along the delivery direction of the delivery source side joint 34 is suppressed (see FIG. 1).

  The pair of stopper protrusions 17, 17 provided on the insertion part 16 on the delivery destination side are provided so as to be located inside the outer opening edge of the insertion part 16 on the delivery destination side. The stopper protrusions 17 and 17 are located closer to the outer opening edge side of the insertion portion 16 than the stopper protrusions 17 and 17, and at least a first flange portion 35 a of a delivery destination side joint 35 serving as a delivery destination side portion of the tube 30. It may be provided so that it can be accepted. In the illustrated example, the delivery held by the delivery destination side joint 35 and the pair of holding projections 15, 15 in a state where the first flange portion 35 a of the delivery destination side joint 35 is in contact with the stopper projections 17, 17. The former side joint 34 and the delivery direction are substantially coincident with each other (see FIG. 1).

The protrusion width W2 of the stopper protrusions 17 and 17 is set to an appropriate dimension so that the stopper protrusions 17 and 17 cannot be inserted between the flange portions 35a and 35b of the delivery destination side joint 35. That's fine. Further, the projecting dimensions of these stopper projections 17, 17, that is, the dimension between the front end surfaces in the projecting direction of these stopper projections 17, 17 is the insertion of the tube 30 to which the delivery destination side joint 35 is connected. It is sufficient to set the dimensions appropriately so that the above can be achieved. Further, the dimension between the front end surfaces of the stopper projections 17 and 17 in the projecting direction may be smaller than the outer diameter of the first flange portion 35a of the delivery destination side joint 35.
In a state where the delivery source side portion is inserted between the stopper protrusions 17 and 17 with respect to the delivery destination side joint 35 of the tube 30, the delivery destination side joint 35 of the tube 30 can be moved in the delivery direction. It will be in a state (refer to Drawing 2 (a)). On the other hand, movement of the delivery destination side joint 35 of the tube 30 toward the delivery direction origin side is restrained by the first flange portion 35a of the delivery destination side joint 35 coming into contact with the stopper projections 17 and 17 (see FIG. 1). .

The rotating body 20 is configured such that a plurality of pressing portions 23 and 23 are provided on the outer peripheral side of the shaft portion 21 serving as the center of rotation so as to be equidistant from the shaft portion 21. That is, the pressing parts 23 and 23 are provided on the rotating body 20 so as to be positioned on the same circumference with the shaft part 21 as a center when viewed in the axial direction. In addition, the pressing portions 23 and 23 are provided at equal intervals in the rotation direction around the shaft portion 21 of the rotating body 20.
In this embodiment, it is set as the structure which provided the two press parts 23 and 23 around the axial part 21 of the rotary body 20 as mentioned above. That is, it is set as the structure which provided the two press parts 23 and 23 in the rotary body 20 so that the space | interval of a mutual rotation direction might be 180 degree | times. In the example shown in the figure, these pressing portions 23 are provided at the tip of a portion provided in an arm shape (spoke shape) so as to protrude from the shaft portion 21 in the radial direction.

In the present embodiment, these pressing portions 23 and 23 are pressing rollers that are rotatable around roller shafts 22 and 22 parallel to the shaft portion 21 of the rotating body 20. In addition, in FIG.3 (b), illustration of the press roller penetrated by the roller shafts 22 and 22 is abbreviate | omitted.
As shown in FIG. 1, these pressing portions 23, 23 are arranged so as to face the inner peripheral wall surface 13 of the pump body 10, and the tube 30 is crushed by the inner peripheral wall surface 13. In the stop position (initial position) of the rotating body 20 shown in FIG. 1, the pressed portion 31 of the tube 30 is formed by one of the two pressing portions 23, 23 and the circumferential central portion of the inner peripheral wall surface 13. The state which crushed is illustrated. When the rotating body 20 is stopped and the tube 30 is crushed in this way, the pressed portion 31 of the tube 30 is blocked, and the fluid cannot be delivered (delivery stopped). The stop position (initial position) of the rotating body 20 is an example, and may be another position.
In the present embodiment, the rotating body 20 includes a state where one of the two pressing portions 23, 23 crushes the tube 30 and both the two pressing portions 23, 23. The tube 30 is crushed and is displaced.

In the present embodiment, tube guides 24, 24 that suppress the displacement of the tube 30 are provided between the pressing portions 23, 23 of the rotating body 20. With such a configuration, it is possible to suppress the tube 30 from being moved away from the inner peripheral wall surface 13 or bent due to the movement of the pressing portions 23 and 23.
In the illustrated example, the tube guides 24 and 24 are provided so as to protrude in the radial direction from the shaft portion 21 of the rotating body 20 and to be equidistant from the adjacent pressing portions 23 and 23. Further, the tube guides 24 and 24 are shaped so as to sandwich the tube 30 from both sides of the rotating body axis so as to suppress the movement of the tube 30 in the rotating body axis direction, and a recess for receiving the tube 30 is formed. As shown, the shape is opened in the radial direction. Further, the bottom 25 in the opening direction of the tube guides 24 and 24 is arranged so as to face the inner peripheral wall surface 13, and is configured to suppress the movement of the tube 30 toward the rotating body axis. Note that such tube guides 24, 24 may not be provided.

The tube 30 has a circular cross section, and as shown in FIG. 1, the pump body 10 ( It is accommodated in the main body case 11).
The tube 30 is formed of an elastomeric material having elasticity that can restore the parts crushed by the pressing portions 23, 23, for example, a synthetic resin elastomer such as EPDM, silicon, or neoprene, or natural rubber. It may be a thing. The material of the tube 30 may be appropriately selected according to the type of fluid to be sent out. Further, the inner diameter of the tube 30, the length along the inner peripheral wall surface 13 and the like may be appropriately set according to the desired flow rate of the fluid to be delivered. Further, the fluid delivered by the tube pump 1 may be various liquids, emulsion (latex) or slurry, or gas.

Further, the source side joint 34 connected to the source side end 32 of the tube body of the tube 30 and the destination side joint 35 connected to the destination side end 33 of the tube body have the same configuration. Has been.
Each of the delivery source side joint 34 and the delivery destination side joint 35 is provided with a first connection portion that is press-fitted into each of the delivery source side end portion 32 and the delivery destination side end portion 33 of the tube body. Further, the first flange portions 34 a and 35 a described above are provided so as to be adjacent to the first connection portions of the delivery source side joint 34 and the delivery destination side joint 35.
Further, the transmission source side joint 34 and the transmission destination side joint 35 are provided with second connection portions 34c and 35c, respectively.

As shown in FIGS. 1 and 2B, the second connection portion 34c of the delivery source side joint 34 of the tube 30 is connected to the delivery source side pipe line 3 connected to the storage portion 2 serving as a fluid delivery source. May be connected. Further, the delivery destination side pipe line 4 that delivers the fluid to the delivery destination 5 of the fluid may be connected to the second connection portion 35 c of the delivery destination side joint 35 of the tube 30. In addition, a check valve, an on-off valve, or the like for preventing the backflow of fluid to the delivery source 2 side is appropriately provided as needed on the delivery source side (upstream side) of the delivery source side joint 34 of the tube 30. It may be.
Note that the source side part and the destination side part of the tube 30 are not limited to the source side joint 34 and the destination side joint 35. For example, in the case where the tube 30 is configured to be elongated in a series so as to extend to the outside of the pump body 10, the tube 30 may be inserted into the insertion portions 14 and 16 of the pump body 10. In this case, a portion to be inserted through the insertion portions 14 and 16 may be appropriately provided with a held portion held by the original holding portion 15 and a contact portion that comes into contact with the stopper portion 17. .

The drive unit 26 that rotates the rotating body 20 is configured to be able to rotate the rotating body 20 forward and backward around the shaft portion 21. As such a drive part 26, you may make it employ | adopt what is called a gear motor provided with gear mechanisms, such as various reduction gears connected with the axial part 21. FIG. In the present embodiment, as will be described later, since it is necessary to stop the rotating body 20 at an appropriate rotation position (rotation angle), the drive unit 26 is provided with a motor with a brake that can control the rotation position, and a servo. It may be a motor or the like. Moreover, you may make it provide detectors, such as a rotation angle sensor which detects the rotation position of the rotary body 20 suitably. Moreover, in this embodiment, it is set as the motor with an encoder and the stepping motor which can detect the rotation angle and rotation frequency of the rotary body 20.
The drive unit 26 is connected to a control panel 40 provided with a control unit 41 as shown in FIG. The drive of this drive part 26 is controlled by the control part 41, the rotary body 20 is rotated, and the fluid is discharged (discharged) and the like as will be described later.

The control unit 41 is configured by a control circuit such as a CPU, for example.
In addition to the control unit 41, the control panel 40 includes a storage unit 42 configured by a memory and the like to store various operation programs, a power supply unit 43 that supplies drive power to the drive unit 26, and operation input reception and display. A display operation unit 44 and the like are provided as appropriate. Further, the control panel 40 may be provided in the tube pump 1 itself, or may be provided in various devices and systems (fluid delivery system) in which the tube pump 1 is incorporated.

In the tube pump 1 configured as described above, if the rotating body 20 is rotated forward from the stop position, the fluid is self-primed and delivered as the pressing portions 23 and 23 move. That is, when the pressing portion 23 moves to the delivery side, the pressed portion 31 that has been crushed in the tube 30 is restored. The fluid from the sending source 2 (sending source side pipe line 3) flows into the upstream side portion of the tube 30 by the negative pressure action accompanying the restoration of the pressed portion 31. Further, the pressing part 23 moves to the delivery side while sequentially crushing the tube 30 and sucks fluid on the upstream side (the rear side in the movement direction to the delivery side of the pressing part 23), while the downstream side (the delivery of the pressing part 23). The fluid in the tube 30 on the front side in the moving direction is sent out toward the delivery destination 5 (delivery destination side pipe line 4).
Further, when the rotating body 20 is stopped at an appropriate rotational position, the fluid delivery is stopped as described above.

  The specific configuration of the tube pump 1 is not limited to the above example. For example, the rotating body 20 may be provided with three or more pressing portions 23. In addition, a stopper that suppresses the movement of the contact portion 35a of the delivery destination side portion 35 of the tube 30 to the original side in the delivery direction at a drawing portion of the delivery destination side portion 35 of the tube 30 in the pump main body 10 to the outside of the pump main body 10. The portion 17 may not be provided. Further, the inner peripheral wall surface 13 of the pump body 10 is not limited to the one having a different diameter in the circumferential direction as described above, and may have the same diameter over the entire circumference. In addition, a configuration in which a plurality of tubes are provided so as to divide the outer peripheral side of the rotating body 20 into a plurality of equal parts in the rotational direction, or a plurality of rotating bodies are provided in parallel in the axial direction, and each outer peripheral side is simply provided on each outer peripheral side. It is good also as what was set as the structure which provided the one or several tube. In addition, the tube pump 1 may have various configurations.

1 Tube pump 10 Pump body 15 Holding protrusion (original side holding part)
17 Stopper protrusion (stopper part)
20 Rotating body 23 Pressing portion 30 Tube 34 Sending source side joint (tube sending source side portion)
35 Destination side joint (Destination side part of tube)
35a First flange portion (contact portion)
35b 2nd flange part W1 Flange dimension (dimension along the sending direction between the 1st flange part and the 2nd flange part)
W2 Projection width dimension (dimension along the delivery direction)

Claims (3)

It has a pump body that houses a rotating body provided with a pressing portion and a tube that is provided on the outer peripheral side of the rotating body and delivers a fluid;
The pump main body has a source side holding portion that suppresses movement of the tube at the delivery source side portion along the delivery direction, while allowing the movement of the delivery destination side portion of the tube toward the delivery direction destination side. A tube pump characterized by In claim 1,
In the pump body, the tube delivery destination side part of the pump body is brought into contact with a contact part provided in the delivery destination side part of the tube, and the corresponding contact part toward the delivery direction origin side is contacted. A tube pump characterized in that a stopper portion for suppressing movement is provided. In claim 2,
A first flange portion and a second flange portion constituting the contact portion are provided in the delivery destination side portion of the tube with an interval in the delivery direction,
The stopper portion of the pump body protrudes in a direction facing each other from both inner side walls formed so as to sandwich the delivery destination side portion of the tube, and the dimensions along the delivery direction are the first flange portion and the second flange. A tube pump characterized in that it is a pair of protrusions that are larger than the dimension along the delivery direction between them.

Images