JP2006514226A - Tube pump - Google Patents

Abstract

In the tube pump 1, the bending portions 3 and 6 are provided at both ends of the tube 2, the opening and closing portions 4 and 7 are provided at the bending portions 3 and 6, and the opening and closing mechanisms are respectively provided at portions corresponding to the opening and closing portions 4 and 7. 11 is provided. The opening / closing mechanism 11 includes cams 16 and 23, a protective frame 12 that converts the rotational motion of the cams 16 and 23 into linear motion, and an actuator that rotationally drives the cams 16 and 23. When the cams 16 and 23 are rotationally driven by the operation of the actuator, the curved portions 3 and 6 are pressed through the protective frame 12, the opening and closing portions 4 and 7 are bent to close the flow path, or the pressure is released. Thus, the opening / closing parts 4 and 7 are restored to the original shape to open the flow path. When the fluid is transported, it is only necessary to bend the tube 2 and release it, so that the fluid can be transported efficiently with small energy.

Description

  The present invention relates to a tube pump that transports fluid by elastically deforming a tube.

As an example of a tube pump that transports fluid by elastically deforming a tube, a casing in which a part of an inner wall surface is formed in an arc surface, an elastic tube provided along the arc surface of the casing, and an arc surface in the casing And a roller provided with a roller that presses the elastic tube against the arc surface on the circular orbit corresponding to the circular arc surface and presses the fluid in the elastic tube. (See, for example, JP-A-8-28453).
However, the tube pump having such a configuration requires a large amount of energy when the elastic tube is crushed by the roller.

As another example of the tube pump, a tube is linearly arranged on the inner surface of a door member that is attached to the case body so as to be freely opened and closed, and the tube is pressed by three portions along the length direction. A configuration in which fluid is transported by sequentially crushing is known (see, for example, Japanese Patent Laid-Open No. 8-170590).
However, even in the tube pump having such a configuration, a large amount of energy is required when the tube is crushed.

Further, as another example of the tube pump, a motor and support side coupling means are provided on the support so that the rotation axis of the motor and the center axis of the support side coupling means coincide with each other, and one end of the tube is coupled to the support side coupling means. Then, the other end of the tube is coupled to the motor side coupling means attached to the rotating shaft of the motor, and the motor is rotated forward and reverse so that the tube is twisted and unscrewed to pump the fluid in the tube. What was comprised is known (for example, refer to Unexamined-Japanese-Patent No. 2002-70748).
However, in the tube pump having such a configuration, since it is necessary to rotate the rotating shaft forward and backward, it is necessary to cancel the inertia every time the direction of the rotational motion is changed, resulting in energy loss.

  The present invention has been made in view of the conventional problems as described above, and can efficiently transport a fluid with small energy without requiring large energy, thereby reducing running cost. It is an object of the present invention to provide a tube pump capable of efficiently transporting a fluid without causing energy loss.

In order to solve the above problems, the present invention is directed to a tube pump for transporting a fluid. In one embodiment of the invention, the tube pump is
An elastically deformable tube having two open / close portions at two spaced apart positions defining a flow path for transporting the fluid therein and opening / closing the flow path;
The two opening / closing points that close the flow path by bending the corresponding opening / closing part of the tube at the two spaced apart positions of the tube and open the flow path by releasing the bending of the opening / closing part. Two opening and closing mechanisms corresponding to each part,
When one of the two opening / closing portions is folded in the state where the other opening / closing portion is bent, the opening / closing portion is further bent by operating the corresponding opening / closing mechanism after closing the flow path at the corresponding portion of the tube. Further bending of the tube increases the internal pressure of the tube between the two opening / closing sections, and the tube pump uses the increased internal pressure in the tube to transport the fluid.
According to the present invention, when the fluid is transported, it is only necessary to bend each opening / closing portion by the opening / closing mechanism and release the folding. Therefore, the fluid can be transported efficiently with small energy, and energy saving can be achieved. The running cost can be reduced.

In the tube pump of the present invention, it is preferable that the increased internal pressure is generated by making the amount of bending of the tube at the one opening / closing portion different from that at the other opening / closing portion.
In the tube pump of the present invention, the tube has two spaced apart curved portions, and each of the opening and closing portions is provided in a part of each of the two curved portions,
It is preferable that the two opening / closing sections are bent by pressing the part of the two bending sections with the corresponding opening / closing mechanism.
According to this invention, when the fluid is transported, it is only necessary to press and release each curved portion by the opening / closing mechanism, so that the fluid can be transported efficiently with a small amount of energy, thereby saving energy. This can reduce the running cost.

In the tube pump of the present invention, each open / close mechanism includes a cam rotatably provided at a portion facing the corresponding curved portion, and the corresponding curved portion is pressed by the cam or the cam to release the pressed state. Thus, it is preferable that the two opening / closing portions are bent or the bending is released by rotationally driving the corresponding cams.
According to the present invention, the cam is driven to rotate, a part of each curved portion of the tube is pressed to follow the rotational drive of the cam, each opening / closing portion is bent, and a portion of the flow path corresponding to each opening / closing portion is formed. From the state of being closed or being released from being pressed and each open / close section bent, the original shape is restored, and the portion of the flow path corresponding to each open / close section is opened.

  Therefore, when the fluid is transported, it is only necessary to press and release each curved portion by the cam, so that the fluid can be transported efficiently with small energy, and energy saving can be achieved. Running costs can be greatly reduced. In addition, since the cam only needs to be rotated in only one direction, no energy loss occurs when the cam is driven to rotate, and the fluid can be transported efficiently.

In the tube pump of the present invention, it is preferable that the amount of bending at the one opening / closing part is different from that of the other opening / closing part by making the sizes of the two cams different from each other.
According to the present invention, since the sizes of the cams are different from each other, when the opening / closing portions are bent by the rotational driving of the cams, it is possible to reliably cause a difference in the amount of bending of the opening / closing portions. .

  In addition, when the fluid is transported, it is only necessary to press and release the curved portions by the large and small cams, so that the fluid can be transported efficiently with a small amount of energy and energy saving can be achieved. The running cost can be greatly reduced. Further, since the large and small cams only need to be rotationally driven in only one direction, no energy loss occurs when the cam is rotationally driven, and the fluid can be transported efficiently.

In the tube pump of the present invention, each of the two cams preferably has a substantially semicircular shape.
In the tube pump of the present invention, each of the opening / closing mechanisms rotates the cam provided therein so as to press a part of the corresponding curved part or release the part of the pressing part. A protective frame provided so as to be reciprocable by driving;
During the rotational drive of each of the two cams, the corresponding opening / closing part is bent by pressing a part of the curved part by moving the protective frame in the direction of the tube during the rotational drive of each of the cams, It is preferable that when the pressing state by the protection frame is released by the movement of the protection frame in the opposite direction, the original shape is restored by the elastic force of the tube itself.

According to this invention, when each cam is driven to rotate, the protective frame advances in the direction of the tube and presses a part of each bending portion, whereby each opening / closing portion is bent or the pressing is released, Each open / close portion is restored to its original shape from the bent state by its own elastic force, and the protection frame is moved backward in the direction away from the tube.
Therefore, the power of the cam can be transmitted to each bending portion without causing transmission loss, so that each opening / closing portion of each bending portion can be bent and restored efficiently.

In the tube pump according to the aspect of the invention, it is preferable that each opening / closing mechanism further includes a connection tool for connecting each protection frame to each opening / closing portion.
According to the present invention, since the protective frame and each opening / closing part are connected by the coupling tool, the opening / closing part does not wear due to slippage between the two, and stable performance in the long term. Will be obtained.

The tube pump of the present invention preferably further includes a base that supports the two curved portions at the tube so as to be elastically deformable, and supports the two protective frames so as to be reciprocally movable therein.
According to the present invention, since the tube and the protective frame are supported by the base, they can be always pressed and bent at a predetermined position, so that a predetermined amount of fluid can always be transported and transport efficiency is improved. Can do.

In the tube pump of the present invention, each open / close mechanism further includes a biasing unit that biases the protective frame in the opposite direction between the protective frame and the base, and each of the bending portions by the protective frame. When the pressing state is released, it is preferable that the protective frame moves in the opposite direction by the cooperation of the restoring force of the opening / closing portion and the urging force of the urging means.
According to this invention, even if the elastic force of the tube is lowered over time, the bent portion of the tube can be forcibly restored to the original shape by the urging force of the urging means. Stable performance can be obtained in the long term.

The tube pump of the present invention further comprises a fixing jig for fixing the predetermined portion of the tube to the base,
It is preferable that the bending amount of each opening / closing part is adjusted by adjusting the mounting position of the fixing jig with respect to the base.
According to the present invention, the amount of bending of the open / close portion of each curved portion of the tube can be adjusted by the adjusting means, so that the fluid flow rate (transport amount) can be adjusted without changing the drive speed of the tube pump. Therefore, versatility can be improved.
It is preferable that the tube pump of the present invention further includes adjusting means for adjusting the bending amount of each opening / closing part.
In the tube pump of the present invention, it is preferable that the flow path is always closed at at least one opening / closing part.

In another embodiment of the invention, the tube pump for transporting fluid is
An elastically deformable tube having two opening / closing portions which define a flow path for transporting the fluid therein and which are spaced apart from each other at a predetermined interval and which open and close the flow path; ,
The flow path is closed by bending the open / close section corresponding to the tube at a portion corresponding to each of the two open / close sections, and the flow path is opened by releasing the folding of the open / close section; Provided in the interval between the two opening and closing parts, comprising an opening and closing mechanism,
When one of the two opening / closing portions is folded in the state where the other opening / closing portion is bent, the opening / closing portion is further bent by operating the corresponding opening / closing mechanism after closing the flow path at the corresponding portion of the tube. The bending amount of the one opening / closing part is made different from that of the other opening / closing part so that the internal pressure of the tube between the two opening / closing parts is increased by further bending of the tube, and the tube pump reduces the increased internal pressure in the tube. The fluid is transported by using the fluid.

According to the present invention, when the fluid is transported, it is only necessary to bend each opening / closing portion by the opening / closing mechanism and release the folding. Therefore, the fluid can be transported efficiently with small energy, and energy saving can be achieved. The running cost can be reduced.
In addition, since it is sufficient to provide one opening / closing mechanism between the opening / closing sections, the whole can be reduced in size and weight, and can be effectively used in places where downsizing and weight reduction are required.

In the tube pump of the present invention, the tube has two curved portions spaced apart from each other, and each of the two opening / closing portions is provided in a part of each of the two curved portions,
It is preferable that the tube pump is configured to bend each of the two opening / closing portions by pressing the part of the two bending portions with the opening / closing mechanism.
According to the present invention, since only one opening / closing mechanism may be provided between the two curved portions of the tube, the whole can be reduced in size and weight, and a portion that is required to be reduced in size and weight. Can be used effectively.

In the tube pump of the present invention, the opening / closing mechanism includes a stepped cam provided in a step shape so that two cam portions having different sizes can rotate, an actuator, and two arms, and the two cams Each has a cam surface on the outer peripheral surface,
In the tube pump, the two opening / closing portions are brought into contact with the cam surfaces of the stepped cam via the two arms, and the opening / closing portions are connected via the arms when the stepped cam is rotationally driven. It is preferably configured to be folded or unfolded.
According to the present invention, two cam portions having different sizes are provided in one cam in a step shape, and each opening / closing portion is in contact with the cam surface of each cam portion via the arm. It can be reduced in weight and can be effectively used in places where downsizing and weight reduction are required.

In the tube pump of the present invention, it is preferable that each of the two cam portions of the stepped cam has a substantially semicircular shape.
In the tube pump of the present invention, it is preferable that the opening / closing mechanism further includes a biasing unit that biases the arms in a direction in which the folding of the opening / closing portion is released.
According to this invention, even if the elastic force of the tube is lowered over time, the bent portion of the tube can be forcibly restored to the original shape by the urging force of the urging means. Stable performance can be obtained in the long term.

In the tube pump of the present invention, it is preferable that the tube pump further includes an adjusting unit that adjusts a bending amount of each of the opening / closing portions.
According to the present invention, the amount of bending of each opening / closing portion of the tube can be adjusted by the adjusting means, so that the flow rate (transport amount) of the fluid can be adjusted without changing the driving speed of the tube pump. Therefore, versatility can be improved.
In the tube pump of the present invention, it is preferable that the flow path is always closed in at least one opening / closing part.

In yet another embodiment of the present invention, the tube pump for transporting fluid comprises:
An elastically deformable tube having two open / close portions at two spaced apart positions defining a flow path for transporting the fluid therein and opening / closing the flow path;
Two opening / closing mechanisms provided so as to correspond to the two opening / closing parts, respectively, wherein one of the two opening / closing mechanisms includes the opening / closing part corresponding to the tube at one of the two spaced apart portions of the tube. The flow path is closed by bending, the flow path is opened by releasing the folding of the opening / closing section, and the other opening / closing mechanism bends or releases the corresponding opening / closing section of the tube. And the two opening / closing mechanisms that open and close the flow path at the other of the two spaced apart portions of the tube,
When the one opening / closing part is further bent by operating the one opening / closing mechanism after the flow path is closed at a corresponding portion of the tube in a state where the other opening / closing part is bent, the opening / closing part is further The internal pressure of the tube between the two opening / closing portions is increased by bending, and the tube pump uses the increased internal pressure in the tube to transport the fluid.
In the tube pump of the present invention, it is preferable that the other opening / closing mechanism includes a valve.
The above and other objects, features and advantages of the present invention will become more readily apparent from the following detailed description of preferred embodiments of the invention which proceeds with reference to the accompanying drawings.

Hereinafter, the tube pump of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.
(First embodiment)
FIG. 1 is a perspective view showing a first embodiment of a tube pump according to the present invention, and FIG. 2 is a front view of the tube pump shown in FIG.

  As shown in these drawings, the tube pump 1 is a tube 2 (elastically deformable) made of an elastic body having a flow path (not shown) through which fluid (various gases, various liquids, etc.) flows. And an opening / closing mechanism 11 for closing a part of the flow path by bending a part of the tube 2 or opening a part of the flow path by releasing the bending, and the tube 2 and the opening / closing mechanism 11. And a base 31 for supporting the.

The tube 2 is easily bent by receiving an external force (load) from a direction substantially orthogonal to the longitudinal direction, and has a characteristic of restoring the original shape from the bent state by releasing the external force (load). A part of the flow path is closed (sealed) and opened by the bending and restoring operation of the tube 2.
The material of the elastic body that constitutes the tube 2 is not particularly limited, and examples thereof include various rubber materials such as various rubber materials such as silicone rubber, various thermoplastic elastomers, various synthetic resin materials, and the like. Is effective.

The tube 2 bends a straight tubular member to form U-shaped (substantially U-shaped) curved portions 3 and 6 at two locations (both ends in the present embodiment), respectively, and the overall shape is substantially M-shaped. The curved bases 3 and 6 are entirely supported by a base 31 to be described later so that each of the curved portions 3 and 6 can be elastically deformed (bent and restored (release of folding)).
Each of the curved portions 3 and 6 of the tube 2 is provided with opening and closing portions 4 and 7 for opening and closing the flow path at one place. Each opening / closing part 4, 7 is bent at a predetermined angle (so as to have a predetermined bending amount) by pressing a part of each bending part 3, 6 by an opening / closing mechanism 11 described later (applying an external force), By releasing the pressing (external force), the tube 2 is restored to the original U shape from the bent state by the elastic force (restoring force) of the tube 2.

Each of the open / close sections 4 and 7 is bent to close the flow path portion corresponding to each of the open / close sections 4 and 7 to prevent the fluid from flowing, and to restore the original shape from the bent state. The part of the flow path corresponding to the opening / closing parts 4 and 7 is opened to allow the fluid to flow.
In this embodiment, the curved portions 3 and 6 are provided at both ends of the tube 2 and the opening and closing portions 4 and 7 are provided at one location of the curved portions 3 and 6, respectively, although not shown. The bending portions may be provided at three or more locations of the tube 2 and the opening / closing portions may be provided at the respective bending portions.

  The base 31 has a rectangular plate shape, and a series of engagement grooves 32 for engaging the tube 2 are provided on the surface side of the base 31. By engaging the whole of the tube 2 except for both ends in the engagement groove 32, the tube 2 is supported on the base 31 by cooperation of its own elastic force and frictional force between the engagement groove 32. Is done. The material of the base 31 is not particularly limited, but various synthetic resin materials are preferable in order to reduce the weight.

  The portions of the engagement groove 32 corresponding to the curved portions 3 and 6 of the tube 2 are formed in rectangular concave portions 33 and 34 having a rectangular shape larger than the external dimensions of the curved portions 3 and 6. By positioning the curved portions 3 and 6 of the tube 2 in the tubes 33 and 34, the open / close portions 4 and 7 of the curved portions 3 and 6 can be folded and can be restored to their original shapes from the folded state. It becomes.

One end portion 9 of the tube 2 protrudes outward from the base 31 from one end of the engagement groove 32, and the other end portion 10 of the tube 2 protrudes outward from the other end of the engagement groove 32. A fluid supply side (not shown) or a discharge side (not shown) is connected to each of the one end 9 and the other end 10 of the projecting tubes 2.
As described above, the tube 2 is fixed in the engagement groove 32 of the base 31 by the cooperation of its own elastic force and the frictional force between the engagement groove 32 of the base 31. The adjustment means 37 as shown in FIG. 1 is provided at one end 9 and the other end 10 of the tube 2 protruding from the engagement groove 32, respectively, or one of them (if only one adjustment means 37 is provided, the one end 9 side The tube 2 may be fixed to the base 31 by the adjusting means 37. Here, FIG. 3 is a partially enlarged explanatory view showing a modification of the first embodiment.

  The adjusting means 37 includes a cylindrical fixing jig 38 having a flange part 39 at one end, a fixing jig side female screw part 40 provided in a state of penetrating the flange part 39 of the fixing jig 38, and a fixing jig side female screw. A base-side female screw portion 41 provided in a portion on the base 31 side corresponding to the portion 40, and an adjustment screw 42 screwed between the female screw portions 40, 41. By fitting one end 9 or the other end 10 of the tube 2 into the center of the fixing jig 38, the one end 9 and the other end 10 of the tube 2 are fixed to the base 31.

  In this case, the distance between the flange portion 39 of the fixing jig 38 and the base 31 can be adjusted by rotating the adjusting screw 42 of the adjusting means 37. Then, the adjusting screw 42 is tightened and the one end 9 or the other end 10 of the tube 2 is pushed into the engaging groove 32 integrally with the cylindrical portion of the fixing jig 38, or the adjusting screw 42 is loosened and engaged. By pulling out from the inside of the groove 32, the bending amount (folding angle) of the open / close portions 4 and 7 of the curved portions 3 and 6 of the tube 2 can be adjusted.

Thereby, the flow rate (transportation amount) of the fluid can be adjusted without changing the driving speed of the tube pump 1, and the versatility of the tube pump 1 is enhanced.
The adjusting means 37 is not limited to the one having the above-described configuration. For example, the adjusting means 37 can fix the tube 2 to the base 31 and can adjust the bending amount of the open / close portions 4 and 7 of the bending portions 3 and 6 of the tube 2. Any configuration can be used.

Rectangular guide grooves 35 and 36 extending obliquely upward from the corner portions are provided in portions corresponding to the corner portions (inner upper portions) of the concave portions 33 and 34 for the curved portions of the base 31, respectively. Opening / closing mechanisms 11 to be described later are provided in 35 and 36, respectively.
The guide grooves 35, 36 are provided so that the distal ends of the protective frames 12, 12 to be described later come into contact with the curved portions 3, 6 of the tube 2 from a direction orthogonal to the longitudinal direction of the tube 2. In this embodiment, it is provided so that a center line may be located on the diagonal line of each recessed part 33, 34 for curved parts.

  The opening / closing mechanism 11 includes protection frames 12 and 12 that are reciprocally movable so as to press the corresponding portions of the curved portions 3 and 6 in the longitudinal direction in the guide grooves 35 and 36, and the protection frames 12 and 12. The cams 16 and 23 that are positioned and rotatably supported by a base 31 via bearings or the like (not shown), the two actuators 21 and 28, and the power of the actuators 21 and 28 are supplied to the cams 16 and 23, respectively. Power transmission members 22 and 29 for transmission are provided.

Each protective frame 12 includes a front frame portion 13 positioned on the tube 2 side, a rear frame portion 14 positioned at a predetermined interval behind the front frame portion 13, and ends of the front frame portion 13 and the rear frame portion 14. This is an angular ring formed of two side frame portions 15, 15 connecting the portions. The protective frames 12 and 12 are configured such that the outer surface side of the front frame portion 13 is in contact with the outer surface sides of the curved portions 3 and 6 of the tube 2.
The front frame portion 13 of each protective frame 12 and the curved portions 3 and 6 of the tube 2 are connected by a connecting tool 30 such as a band, for example, and the front frame portion of each protective frame 12 when the protective frame 12 reciprocates. 13 and the curved portions 3 and 6 of the tube 2 are relatively slipped (that is, the front frame portion 13 of each protective frame 12 and the curved portions 3 and 6 of the tube 2 are recessed (engagement grooves). ) Slipping each other within 33 or 34), preventing the curved portions 3, 6 from rubbing. In the case where relative slip does not occur between the front frame portion 13 of each protective frame 12 and the curved portions 3 and 6 of the tube 2, it is not necessary to provide the connector 30 in the tube pump 1.

  Each of the cams 16 and 23 is a flat cam having a substantially semi-disc shape, and the outer peripheral surfaces of the cams 16 and 23 are formed on the cam surfaces 17 and 24, respectively. The cam surfaces 17 and 24 are linear planes connecting between the semicircular curved surface portions 18 and 25 centering on the rotation centers 20 and 27 of the cams 16 and 23 and the ends of the curved surface portions 18 and 25. The boundary portions between the curved surface portions 18 and 25 and the flat surface portions 19 and 26 are formed as curved surfaces having a predetermined curvature (curvature smaller than the curved surface portions 18 and 25). The material of each of the cams 16 and 23 is not particularly limited, but various synthetic resin materials are preferable in order to reduce the weight.

  The actuators 21 and 28 are motors, for example, and are attached to the back side of the base 31. Power transmission members 22, 29 are provided between the drive shafts (not shown) of the motors 21, 28 and the cams 16, 23, and the driving forces of the motors 21, 28 are applied by the power transmission members 22, 29. The cams 16 and 23 are driven to rotate by being transmitted to the cams 16 and 23. As the motors 21 and 28, a motor with a reduction gear is effective. The motor with a speed reducer can rotate the cams 16 and 23 at a low speed, so that “high torque can be obtained”, “no need to provide a speed reduction mechanism”, and “the curved portions 3 and 6 of the tube 2 are original. It is possible to sufficiently follow when returning to the shape of "." The actuators 21 and 28 are not limited to motors, but may be actuators using electromagnetic force, actuators using fluid pressure, or the like.

  The power transmission members 22 and 29 transmit the driving force of the motors 21 and 28 to the cams 16 and 23 and rotate both the cams 16 and 23 in synchronism with each other. The flat portions 19 and 26 have a function of adjusting the phase where the flat portions 19 and 26 are located on the tube 2 side to be shifted by 180 °. Examples of the power transmission members 22 and 29 include gears, belts, and cranks. In addition, you may rotate both the cams 16 and 23 synchronizing using the motors with a stepping motor, an encoder, etc. for the motors 21 and 28. FIG. Alternatively, a single motor may be used, and the cams 16 and 23 may be rotated synchronously by the power transmission members 22 and 29.

The positional relationship between the curved portions 3 and 6 of the tube 2, the cams 16 and 23, and the protective frames 12 is such that the open / close portions 4 and 7 of the curved portions 3 and 6 of the tube 2 are not bent (that is, When the open / close portions 4 and 7 are in a U shape (initial state), the cam surfaces 17 and 24 (plane portions 19 and 26) of the cams 16 and 23 come into contact with the front frame portion 13 of the protective frame 12. Is set.
By setting the positional relationship as described above, the open / close parts 4 and 7 of the curved parts 3 and 6 of the tube 2 are alternately bent and restored by the rotational driving of the cams 16 and 23, and the open / close parts 4 and 7 are alternately repeated. The closing and opening of the portion of the flow path corresponding to is repeated alternately.

  That is, when the curved surface portions 18 and 25 of the cam surfaces 17 and 24 are positioned on the front frame portion 13 of each protection frame 12, each protection frame 12 moves in the direction of the tube 2 in each guide groove 35 and 36. The curved portions 3 and 6 of the tube 2 are pressed inward by the front frame portion 13 of the protective frame 12, and the open / close portions 4 and 7 of the curved portions 3 and 6 are bent into a V shape (substantially V shape). The flow path portions corresponding to the portions 4 and 7 are closed. Further, when the flat portions 19 and 26 of the cam surfaces 17 and 24 are positioned on the front frame portion 13 of each protection frame 12, the pressing state of each of the bending portions 3 and 6 by each protection frame 12 is released, and each bending portion 3. 6, the opening / closing parts 4, 7 are restored from the V shape to the original U shape by their own elastic force, and the protective frames 12 follow the restoration of the curved parts 3, 6 and are in the guide grooves 35, 36. Is moved away from the tube 2, and the flow path portions corresponding to the open / close portions 4 and 7 are opened. In this case, the flow path is always closed in any one (at least one) of the opening / closing parts 4 and 7.

  Both the cams 16 and 23 are formed so as to have different sizes (radii), so that one bending portion when the one bending portion 3 is pressed by the rotational drive of one cam (large) 16. 3 and the bending amount (bending amount) of the opening / closing portion 4 and the bending amount of the opening / closing portion 7 of the other bending portion 6 when the other bending portion 6 is pressed by the rotational drive of the other cam (small) 23. There is a difference. Opening / closing positions that are located on both sides of the folding portions 5 and 8 when the opening and closing portions 4 and 7 are folded and the flow path is closed by causing a difference in the amount of bending at the opening and closing portions 4 and 7. A difference can be made in the volume of the portion crushed by the mechanism 11. That is, the bending amount of the opening / closing part 4 when the bending part 3 is pressed by the rotational drive of the cam (large) 16 is the opening / closing part 7 when the bending part 6 is pressed by the rotational drive of the cam (small) 23. Therefore, the volume of the portion to be crushed by the opening / closing mechanism 11 located on both sides of the bending portion 5 when the opening / closing portion 4 is bent and the flow path is closed is larger than the amount of bending of the opening / closing portion 7. Is larger than the volume of the portion to be crushed by the opening / closing mechanism 11 positioned on both sides of the bent portion 8 when the flow path is closed.

A cover (not shown) having the same shape and the same size as the base 31 is attached to the surface side of the base 31, and the tube 2 and the opening / closing mechanism 11 are inserted into the engagement groove 32 and the guide grooves 35 and 36 by this cover. The component is prevented from falling off.
Then, one end 9 of the tube 2 of the tube pump 1 according to this embodiment configured as described above is connected to the fluid supply side (not shown), and the other end 10 is connected to the fluid discharge side (not shown). When the motors 21 and 28 are operated and the cams 16 and 23 are driven to rotate, the following operations [1] to [4] are sequentially repeated.

[1] First, in the initial state, the flat surface portion 19 of the cam surface 17 of one cam (large) 16 is located on the front frame portion 13 side of the protective frame 12 and the cam surface 24 of the other cam (small) 23 is The curved surface portion 25 is located on the front frame portion 13 side of the protective frame 12, the one bending portion 3 of the tube 2 maintains a U shape in a non-pressed state, and the flow path corresponding to the opening / closing portion 4 of the one bending portion 3 The part is in an open state, the other curved part 6 is pressed, the opening / closing part 7 is bent into a V shape, and the part of the flow path corresponding to the opening / closing part 7 is closed.
In this case, since the opening / closing part 7 of the other bending part 6 is in a bent state, the volume (volume) on both sides of the bending part 8 is smaller than the volume before bending.

[2] Next, from the initial state of [1], one cam (large) 16 and the other cam (small) 23 are each rotated 90 °, and the curved surface portion 18 of the cam surface 17 of the one cam 16 is the protective frame. 12 on the front frame 13 side. In this state, one of the curved portions 3 is pressed, the opening / closing portion 4 is bent into a V shape, and the portion of the flow path corresponding to the opening / closing portion 4 is closed. In this case, the other cam (small) 23 maintains the state [1] (closed state).
Moreover, since the opening / closing part 4 of the one bending part 3 and the opening / closing part 7 of the other bending part 6 are in a folded state, the volume on both sides of each bending part 5, 8 is smaller than the volume before bending. Yes. For this reason, the pressure between the bending parts 5 and 8 rises before the opening / closing part 4 is bent, and becomes higher than the pressure on the right side of the bending part 8 in FIG.

[3] Next, from the state [2], one cam (large) 16 and the other cam (small) 23 are each rotated 90 °, and the flat portion 26 of the cam surface 24 of the other cam 23 is the protective frame 12. Located on the front frame 13 side. In this state, the pressing state of the other bending portion 6 is released, and the opening / closing portion 7 is restored from the V shape to the original U shape by the elastic force of the tube 2, and the flow corresponding to the opening / closing portion 7 of the other bending portion 6. The road section is opened. In this case, one cam 16 maintains the state [2] (closed state).
Moreover, since the opening / closing part 4 of the one bending part 3 is in a bent state, the volume on both sides of the bending part 5 is smaller than the volume before the bending.

[4] Next, from the state [3], one cam (large) 16 and the other cam (small) 23 are each rotated 90 °, and the curved surface portion 25 of the cam surface 24 of the other cam 23 is the protective frame 12. It is located in the front frame portion 13. In this state, the other bending portion 6 is pressed and bent into a V shape, and the flow path portion corresponding to the opening / closing portion 7 is closed. In this case, one cam (large) 16 maintains the state [2] (closed state).
Moreover, since the opening / closing part 4 of the one bending part 3 and the opening / closing part 7 of the other bending part 6 are in a folded state, the volume on both sides of each bending part 5, 8 is smaller than the volume before bending. Yes. For this reason, the pressure between the bending parts 5 and 8 rises before the opening / closing part 7 is bent, and becomes higher than the pressure on the left side of the bending part 8 in FIG.

Next, when one cam (large) 16 and the other cam (small) 23 rotate 90 ° from the state [4], the state returns to the initial state [1] and one cycle (one rotation) is completed.
Here, in the state [2], the pressure between the bent portions 5 and 8 is higher than the pressure on the right side of the bent portion 8 in FIG. When the corresponding channel portion is opened, the fluid flows toward the right side in FIG.

Further, in the state [4], the pressure between the bent portions 5 and 8 is higher than the pressure on the left side of the bent portion 8 in FIG. 2, so the state is [1] and corresponds to the opening / closing portion 4 of the bending portion 3. When the portion of the flow path to be opened is opened, the fluid flows toward the left side in FIG.
In this case, since the amount of bending of the bent portion 5 of the opening / closing portion 4 is larger than the amount of bending of the bending portion 8 of the opening / closing portion 7, the bending immediately before the portion of the flow path corresponding to the opening / closing portion 7 of the bending portion 6 is opened. The pressure between the portions 5 and 8 is greater than the pressure between the bent portions 5 and 8 immediately before the flow path portion corresponding to the opening / closing portion 4 of the bending portion 3 is opened. Therefore, in one cycle, the flow rate of the fluid flowing toward the right side in FIG. 2 is larger than the flow rate of the fluid flowing toward the left side in FIG. 2, so that the fluid flows to one end of the tube 2 (left side in FIG. 2). The other end (right side in FIG. 2) is transported.
By repeating the above operations [1] to [4] and repeatedly opening and closing the opening / closing portion 4 of one bending portion 3 and opening / closing the opening / closing portion 7 of the other bending portion 6, one end ( Fluid is transported continuously (one after the other) from the left side in FIG. 2 to the other end (right side in FIG. 2).

Next, the operation of the tube pump 1 in the present embodiment will be described with reference to the tables of FIGS.
<Prerequisites>
[a] The pressure in the initial state inside the tube 2 and outside the tube 2 is the same as the atmospheric pressure (1 atm).
[b] The left end of the tube 2 is filled with water (the hatched portion in FIG. 4), and this left end is sealed with water. The left and right ends of the water at the left end are open to the atmosphere.
[c] The tube 2 is formed by folding the open / close portions 4 and 7 (the bent portions 5 and 8), so that the left and right sides of the bent portions 5 and 8 are first closed (sealed), and the tube 2 The volume (volume) in is further reduced.
[d] The bent portion 5 by the cam (large) 16 reduces the volume more than the cam (small) 23.
[e] Temporarily, the left and right bent portions 5 and 8 are in a sealed state, but the inner volume of the tube 2 between the bent portions 5 and 8 is not changed in volume beyond that (the tube 2 is between the bent portions 5 and 8). The internal volume at the moment of sealing) is defined as volume c. In FIG. 4, the volume change of the tube 2 from the open state to the moment of sealing is ignored. Therefore, the tube 2 corresponding to that portion at the moment when the tube 2 is sealed by the bent portions 5 and 8 is shown in a cylindrical shape (columnar shape) in FIG.
[f] The cam (large) 16 bends the tube 2 from the pass-through state (open state) to make it sealed first, and then further folds the tube 2 from the sealed state to the final state (further bends). The volume in the tube 2 that decreases until the state) is 2 × a. The same volume a decreases on both sides of the sealed portion.
[g] Similarly, after the cam (small) 23 bends the tube 2 into a sealed state, the volume in the tube 2 that decreases by further bending the tube 2 is 2 × b. The substantially same volume b decreases on both sides of the sealed portion.
[h] The internal volume in a state where the water and the cam (large) 16 are only sealed is defined as a volume d.
[i] Pressure is ideally inversely proportional to volume (PV = constant isothermal compression).

The following (1) to (9 ′) correspond to (1) to (9 ′) in the table shown in FIG.
(1) In an initial state, the bent portion 5 of the cam (large) 16 is in an open state, and the volume (internal volume) between the bent portions 5 and 8 of both cams 16 and 23 is c−b, The volume between the bent portions 5 and 8 of the cam (large) 16 is d as per the precondition. The internal pressure is an initial value of 1 atm.

(2) First, the bent portion 5 of the cam (large) 16 is closed. The volume between the bent portions 5 and 8 of both the cams 16 and 23 is reduced to a to c−a−b. The pressure in this portion is (c−a) / (c−a−b) obtained by dividing the volume before the change by the volume after the change because the volume has decreased by 1 a from 1 atm. Since the denominator is smaller than the numerator, the pressure is 1 atmosphere or more. Further, the volume between water and the bent portion 5 of the cam (large) 16 is da. The pressure in the same portion is once d / (da), and the pressure is also 1 atm or higher.
(2 ′) There is no change between the bent portions 5 and 8 of the cams 16 and 23 because both ends are sealed, but the pressure between the bent portion 5 of water and the cam (large) 16 is the right and left of the water. A pressure imbalance occurs, and once the water is pushed to the left in the figure. If the surface tension of water is ignored and the water is pushed to the same atmospheric pressure as the atmospheric pressure, the volume becomes d again.

(3) The bent portion 8 of the cam (small) 23 is opened, and the volume between the bent portions 5 and 8 of both the cams 16 and 23 is c−a. Since it becomes an open state toward the atmosphere, the pressure returns to 1 atmosphere.
(4) The bent portion 8 of the cam (small) 23 is again closed. The volume between the bent parts 5 and 8 of both the cams 16 and 23 becomes c−a−b again, and the pressure is obtained by dividing the volume before the change by the volume after the change (c−a) / (c−a−b). )

(5) The bent portion 5 of the cam (large) 16 is again opened. The connection between the bent portions 5 and 8 of both the cams 16 and 23 and the bent portion 5 of the water and the cam (large) 16 are connected, and the pressure is common (the pressure between the two portions is the same). . The volume increases by a on both sides of the bent portion 5. The pressure after the change is a value obtained by dividing the total of each pressure × volume of (4) before the change by the volume after the change. The calculation formula is shown below.
(Pressure 1 before change) × (volume 1 before change) + (pressure 2 before change) × (volume 2 before change) = (pressure after change) × (volume after change)
Pressure after change = {(pressure 1 before change) × (volume 1 before change) + (pressure 2 before change) × (volume 2 before change)} / (volume after change)
P = {(c−a−b) × (c−a) / (c−a−b) + d × 1} / {(c−b) + (d + a)} = (c−a + d) / (c− b + d + a)
The pressure after the change is 1 atm or less because the denominator is larger than the numerator.

(5 ') Similar to (2') above, a pressure difference occurs at both ends of the water. This time, the pressure on the right side of the water is less than 1 atm on the left, so the water is pushed to the right The pressure returns to 1 atmosphere. The formula for calculating the volume after the change is shown below.
(Pressure before change) x (Volume before change) = (Pressure after change) x (Volume after change)
Volume after change = (pressure before change) × (volume before change) / pressure after change V = (c−a + d) / (c−b + d + a) × (c−b + d + a) / 1 = c−a + d
The volume obtained by subtracting the volume between the bent parts 5 and 8 (this is constant) from the volume after the change is
(C−a + d) − (c−b) = (d−a + b) = d− (a−b)
It becomes.

The operations after (6) indicate the case where the operation is continued in the same manner as in the above (1) to (5 ′).
Here, comparing (1) with the same phase (5 ') and (9'), the volume between water and the cam (large) 16 is reduced by ab in one cycle (one rotation). I can see it going. That is, the pump is sent in one cycle to the smaller volume change between the bent portions 5 and 8 by the difference in volume change between the left and right bent portions 5 and 8.

Note that the actual compression state is not the isothermal compression used for the preconditions, but the polytropic compression PV ⁿ = constant, but the operating principle is the same as described above. In the above description, the inside of the tube 2 is explained on the premise of air and gas. However, the operation principle is the same in the case of liquid, and the tube 2 itself is not compressed like gas. The only difference is that the tube 2 expands due to the elastic force, and the elasticity of the tube 2 and the suction force due to the restoring force.

  In the tube pump 1 according to this embodiment configured as described above, one curve of the tube 2 via each protective frame 12 by the rotational drive of one cam (large) 16 and the other cam (small) 23. By pressing the part 3 and the other bending part 6 and bending the opening / closing parts 4 and 7 of the bending parts 3 and 6, it is possible to close (seal) the portion of the flow path corresponding to the opening / closing parts 4 and 7. At the same time, by releasing the pressing state through each protection frame 12, the opening and closing parts 4 and 7 are restored to their original shapes by their own elastic force, and the flow paths corresponding to the opening and closing parts 4 and 7 are restored. The part can be opened. For this reason, energy saving can be achieved without requiring large energy for opening and closing the opening and closing portions 4 and 7, and the running cost of the tube pump 1 can be reduced.

Moreover, in the tube pump 1, since each cam 16 and 23 should just be rotated in the same direction, an energy loss does not arise like the case where it rotates forward / reversely, and a highly efficient tube pump can be provided.
In the present invention, on the downstream side opening / closing part 7 side, instead of a mechanism (configuration) that closes the flow path by folding the opening / closing part 7 and opens the flow path by releasing the bending, for example, A valve may be provided on the opening / closing part 7 side, and the flow path may be opened and closed by the valve.

Next, a second embodiment of the tube pump will be described.
About the tube pump 1 of 2nd Embodiment, it demonstrates centering around difference with 1st Embodiment mentioned above, The description is abbreviate | omitted about the same matter.
FIG. 6 is a plan view showing a second embodiment of the tube pump according to the present invention. In the tube pump 1 of the second embodiment, each protective frame 12 is urged in a direction away from the tube 2 between the rear frame portion 14 of each protective frame 12 and the inner surfaces of the respective guide grooves 35 and 36 opposed thereto. The urging means 45 (which urges the tube 2 in the direction of releasing the folding of the open / close portions 4 and 7) is provided. Other configurations of the tube pump 1 are the same as those shown in the first embodiment. When the pressing state by the cams 16 and 23 is released, the protective frame 12 is forcibly separated from the tube 2 by the urging force of the urging means 45 (that is, the direction perpendicular to the longitudinal direction of the protective frame 12). Move to.

Examples of the urging means 45 include an extended spring (tensile spring), a hydraulic pressure, a pneumatic cylinder, and the like. For example, when a contracted spring is used, the installation position of the spring may be changed.
Even in the tube pump 1 shown in this embodiment, like the one shown in the first embodiment, one cam (large) 16 and the other cam (small) 23 are driven to rotate through each protective frame 12. By pressing one bending portion 3 and the other bending portion 6 of the tube 2 and bending the opening and closing portions 4 and 7 of the bending portions 3 and 6, the flow path portions corresponding to the opening and closing portions 4 and 7 are closed. (Sealing), and by releasing the pressing state through each protective frame 12, the opening / closing parts 4, 7 are restored to their original shapes by their own elastic force, and the opening / closing parts 4, 7 can be opened. For this reason, energy saving can be achieved without requiring large energy for opening and closing the opening and closing parts 4 and 7, and the running cost can be reduced.

Moreover, in the tube pump 1, since each cam 16 and 23 should just be rotated in the same direction, an energy loss does not arise like the case where it rotates forward / reversely, and a highly efficient tube pump can be provided.
Furthermore, in this embodiment, each protective frame 12 is forcibly moved away from the tube 2 by the urging force of the urging means 45 (that is, the direction perpendicular to the longitudinal direction of each protective frame 12). Even when the elastic force of the tube 2 decreases due to a change over time, the bending and restoration of the open / close portions 4 and 7 of the curved portions 3 and 6 of the tube 2 can be stably repeated, and the predetermined performance Will be obtained in the long term. Note that, when the elastic force of the tube 2 decreases with time, the connector 30 connects the open / close portions 4 and 7 to the operation of each protective frame 12 and the urging means 45 opens the tube 2 from the closed state. Has the function of

Next, a third embodiment of the tube pump will be described.
About the tube pump 1 of 3rd Embodiment, it demonstrates centering around difference with 1st Embodiment mentioned above, The description is abbreviate | omitted about the same matter.
FIG. 7 is a plan view showing a tube pump according to a third embodiment of the present invention, FIG. 8 is a perspective view showing a cam of the tube pump of the third embodiment, and FIG. 9 is a diagram of the third embodiment. It is a perspective view which shows the arm of a tube pump. As shown in these drawings, the tube pump 1 is provided with the curved portions 3 and 6 (opening and closing portions 4 and 7) at both ends of the tube 2 facing each other with a predetermined interval therebetween, and both the curved portions 3 , 6 are rotatably provided, and between the cam 50 and the bending portions 3 and 6, arms 59 and 61 for converting the rotational motion of the cam 50 into linear motion are provided, respectively. The open / close parts 4 and 7 of the bending parts 3 and 6 are directly bent via the arms 59 and 61, or are restored to the original U shape by the elastic force of the tube 2 from the bent state. Other configurations are the same as those shown in the first embodiment.

  As shown in FIG. 8, the cam 50 is a stepped cam in which a large cam portion 51 and a small cam portion 55 having different sizes (radius) are provided in two stages. The front end surface of one arm 59 is in contact with the surface 52, and the front end surface of the other arm 61 is in contact with the cam surface 56 on the outer peripheral surface of the small cam portion 55. In addition, through holes 60 and 62 penetrating in the direction perpendicular to the axis line are provided at the distal ends of the arms 59 and 61, and the curved portions 3 and 6 of the tube 2 are inserted into the through holes 60 and 62, respectively. ing. Furthermore, each arm 59, 61 is engaged in each guide groove 66, 67 provided in the base 65, and can reciprocate in the horizontal direction.

  Even in the tube pump 1 according to this embodiment configured as described above, one of the tubes 2 is connected via the arms 59 and 61 by the rotational drive of the cam 50, as in the first embodiment. The bending portion 3 and the other bending portion 6 are pressed and the opening / closing portions 4 and 7 of the bending portions 3 and 6 are bent, thereby closing (sealing) the portion of the flow path corresponding to the opening and closing portions 4 and 7. The opening / closing parts 4 and 7 are restored to their original shapes by their own elastic force by releasing the pressed state via the arms 59 and 61, and correspond to the opening / closing parts 4 and 7. A portion of the flow path can be opened. For this reason, energy saving can be achieved without requiring large energy for opening and closing the opening and closing portions 4 and 7, and the running cost of the tube pump 1 can be reduced.

Moreover, since the tube pump 1 should just rotate the cam 50 in the same direction, an energy loss does not arise like the case where it rotates forward / reversely, and a highly efficient tube pump can be provided.
Furthermore, in this embodiment, since the opening and closing parts 4 and 7 of the two bending parts 3 and 6 can be bent and restored with a single cam 50, space saving can be achieved, and the overall size can be reduced. The weight can be reduced. Therefore, the tube pump 1 can be used effectively even in a place where the tube pump 1 that is reduced in size and weight is required.
Also in this embodiment, the urging means 45 may be provided as in the second embodiment described above.

As described above, the present invention has been described based on the illustrated embodiment. However, the present invention is not limited to this, and the configuration of each unit can be replaced with any configuration having the same function. . In addition, any other component may be added to the present invention.
Further, the present invention may be a combination of any two or more configurations (features) of the above embodiments.
Moreover, in this invention, the opening / closing part may be provided in three or more places.

  This application claims the benefit of priority of Japanese Patent Application No. 2003-300038 filed on Aug. 25, 2003. This earlier application is hereby incorporated by reference in its entirety.

The perspective view which shows 1st Embodiment of the tube pump by this invention. The front view of the tube pump shown in FIG. The partial expansion explanatory view which shows the modification of 1st Embodiment. The schematic diagram which shows operation | movement of the tube pump by this invention. Explanatory drawing which shows the internal pressure between the two bending parts of the tube pump by this invention. The top view which shows 2nd Embodiment of the tube pump by this invention. The top view which shows 3rd Embodiment of the tube pump by this invention. The perspective view which shows the cam of the tube pump of 3rd Embodiment. The perspective view which shows the arm of the tube pump of 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tube pump, 2 Tube, 3, 6 Bending part, 4, 7 Opening / closing part, 5, 8 Bending part, 9 One end part, 10 Other end part, 11 Opening / closing mechanism, 12 Protective frame, 13 Front frame part, 14 Rear frame Part, 15 side frame part, 16, 23, 50 cam, 17, 24, 52, 56 cam surface 18, 25 curved part, 19, 26 flat part, 20, 27 center of rotation, 21, 28 actuator (motor), 22 , 29 Power transmission member, 30 coupling tool, 31, 65 base, 32 engagement groove, 33, 34 concave portion for bending portion, 35, 36, 66, 67 guide groove, 37 adjusting means, 38 fixing jig, 39 flange portion, 40 Fixing jig side female thread part, 41 Base side female thread part, 42 Adjustment screw, 45 Biasing means, 51 Large cam part, 55 Small cam part, 59, 61 Arm, 60, 62 Through hole

Claims (22)

A tube pump for transporting fluid,
An elastically deformable tube having two open / close portions at two spaced apart positions defining a flow path for transporting the fluid therein and opening / closing the flow path;
The two opening / closing points that close the flow path by bending the corresponding opening / closing part of the tube at the two spaced apart positions of the tube and open the flow path by releasing the bending of the opening / closing part. Two opening and closing mechanisms corresponding to each part,
When one of the two opening / closing portions is folded in the state where the other opening / closing portion is bent, the opening / closing portion is further bent by operating the corresponding opening / closing mechanism after closing the flow path at the corresponding portion of the tube. The tube pump is characterized in that the internal pressure of the tube between the two opening / closing portions is increased by further folding, and the tube pump transports the fluid using the increased internal pressure in the tube.   2. The tube pump according to claim 1, wherein the increased internal pressure is generated by making a bending amount of the tube at the one opening / closing portion different from that at the other opening / closing portion. The tube has two curved portions spaced apart from each other, and each opening and closing portion is provided in a part of each of the two curved portions,
The tube pump according to claim 2, wherein each of the two opening / closing parts is bent by pressing the part of the two bending parts with the corresponding opening / closing mechanism.   Each open / close mechanism includes a cam rotatably provided at a portion facing the corresponding curved portion, and the corresponding cam is released by pressing the corresponding curved portion with the cam or the cam. The tube pump according to claim 3, wherein each of the two opening / closing portions is bent or the bending is released by rotationally driving.   The tube pump according to claim 4, wherein the two cams are made different in size so that a bending amount in the one opening / closing part is different from that of the other opening / closing part.   The tube pump according to claim 4, wherein each of the two cams has a substantially semicircular shape. Each of the opening / closing mechanisms is provided so as to be able to reciprocate by pressing a part of the corresponding bending portion or rotating the cam provided therein so as to release the pressing state of the part. Further comprising a protective frame,
During the rotational drive of each of the two cams, the corresponding opening / closing part is bent by pressing a part of the curved part by moving the protective frame in the direction of the tube during the rotational drive of each of the cams, The tube pump according to claim 4, wherein the tube pump is configured to be restored to its original shape by the elastic force of the tube itself when the pressing state by the protection frame is released by the movement of the protection frame in the opposite direction.   The tube pump according to claim 7, wherein each opening / closing mechanism further includes a connector for connecting each protection frame to each opening / closing portion.   The tube pump according to claim 7, further comprising a base that supports the two curved portions on the tube so as to be elastically deformable and supports the two protective frames so as to reciprocate therein.   Each opening / closing mechanism further includes an urging means for urging the protective frame in the opposite direction between the protective frame and the base, and when the pressing state of each curved portion by the protective frame is released The tube pump according to claim 9, wherein the protective frame moves in the opposite direction by the cooperation of the restoring force of the opening / closing portion and the urging force of the urging means. A fixing jig for fixing the predetermined portion of the tube to the base;
The tube pump according to claim 9, wherein the tube pump is configured to adjust a bending amount of each opening / closing portion by adjusting a mounting position of the fixing jig with respect to the base.   The tube pump according to claim 1, further comprising an adjusting unit that adjusts a bending amount of each opening / closing part.   The tube pump according to claim 1, wherein the flow path is always closed in at least one of the opening / closing portions. A tube pump for transporting fluid,
An elastically deformable tube having two opening / closing portions which define a flow path for transporting the fluid therein and which are spaced apart from each other at a predetermined interval and which open and close the flow path; ,
The flow path is closed by bending the open / close section corresponding to the tube at a portion corresponding to each of the two open / close sections, and the flow path is opened by releasing the folding of the open / close section; Provided in the interval between the two opening and closing parts, comprising an opening and closing mechanism,
When one of the two opening / closing portions is folded in the state where the other opening / closing portion is bent, the opening / closing portion is further bent by operating the corresponding opening / closing mechanism after closing the flow path at the corresponding portion of the tube. The bending amount of the one opening / closing part is made different from that of the other opening / closing part so that the internal pressure of the tube between the two opening / closing parts is increased by further bending of the tube, and the tube pump reduces the increased internal pressure in the tube. A tube pump characterized in that the fluid is transported using the tube pump. The tube has two curved portions spaced apart from each other, and each of the two opening / closing portions is provided in a part of the two curved portions,
The tube pump according to claim 14, wherein the tube pump is configured to bend each of the two opening / closing portions by pressing the part of the two bending portions with the opening / closing mechanism. The opening / closing mechanism includes a stepped cam provided in a step shape so that two cam portions of different sizes can rotate, an actuator, and two arms, and the two cam portions are camped on an outer peripheral surface. Each has a surface,
In the tube pump, the two opening / closing portions are brought into contact with the cam surfaces of the stepped cam via the two arms, and the opening / closing portions are connected via the arms when the stepped cam is rotationally driven. 15. A tube pump according to claim 14 configured to be folded or unfolded.   The tube pump according to claim 16, wherein each of the two cam portions of the stepped cam has a substantially semicircular shape.   The tube pump according to claim 14, wherein the opening / closing mechanism further includes a biasing unit that biases the arms in a direction in which the folding of the opening / closing portion is released.   The tube pump according to claim 14, further comprising adjusting means for adjusting a bending amount of each opening / closing part.   The tube pump according to claim 14, wherein the flow path is always closed in at least one of the opening / closing portions. A tube pump for transporting fluid,
An elastically deformable tube having two open / close portions at two spaced apart positions defining a flow path for transporting the fluid therein and opening / closing the flow path;
Two opening / closing mechanisms provided to respectively correspond to the two opening / closing portions, wherein one of the two opening / closing mechanisms includes the opening / closing portion corresponding to the tube at one of the two spaced apart portions of the tube. The flow path is closed by bending, the flow path is opened by releasing the folding of the opening / closing section, and the other opening / closing mechanism bends or releases the corresponding opening / closing section of the tube. And the two opening / closing mechanisms that open and close the flow path at the other of the two spaced apart portions of the tube,
When the one opening / closing part is further bent by operating the one opening / closing mechanism after the flow path is closed at a corresponding portion of the tube in a state where the other opening / closing part is bent, the opening / closing part is further The tube pump is characterized in that an internal pressure of the tube between the two opening / closing portions is increased by bending, and the tube pump uses the increased internal pressure in the tube to transport the fluid. The tube pump according to claim 21, wherein the other opening / closing mechanism includes a valve.

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