JP5920426B2 - Fluid transport device - Google Patents

Description

  The present invention relates to a fluid transportation device that transports a small amount of fluid at a low speed.

Conventionally, there is a peristaltic pump as a device for transporting a liquid at a low speed. As a peristaltic drive type pump, there is a pump having a structure in which a tube having elasticity as a fluid transport channel is pressed from an upstream side to a downstream side by a plurality of fingers to send out a liquid (for example, see Patent Document 1). .
Alternatively, there is a structure in which a tube is pressed from the upstream side to the downstream side by a plurality of rollers attached to the rotating body to send out the liquid (for example, see Patent Document 2).
Both of these pumps are called tube pumps because they send liquid by pressing an elastic tube.

JP-T-2001-515557 JP-A-2-280763

  In the case of feeding a small amount of liquid, the tube pumps according to Patent Document 1 and Patent Document 2 described above have a structure in which the tube is pressed to feed the liquid. Directly affect. However, it is difficult to ensure the accuracy of the inner diameter of the tube having elasticity.

  The present invention has been made to solve the above-described problems, and can be realized as the following forms or application examples.

  [Application Example 1] A fluid transportation device according to this application example includes a rotating body, an arc-shaped groove formed concentrically with a rotating shaft of the rotating body on a flow path frame side surface, and the groove in the direction of the rotating body. A sheet-like elastic member that seals the opening; and a fluid transport channel formed between the rotating body and the elastic member, and the elastic member is deformed by the rotation of the rotating body. And a plurality of pressing members that sequentially close and open the transport channel from the upstream side to the downstream side.

  According to this application example, the transport channel is configured by a groove formed in the channel frame and a sheet-like elastic member. Compared with the inner diameter accuracy of conventional elastic tubes, the groove can be formed with high accuracy by means such as injection molding, and the sheet-like elastic member has little effect on the dimensional fluctuation of the transport channel. There is an effect that the cross-sectional area accuracy of the flow path is improved, and fluctuations in the transport amount of the fluid due to fluctuations in the cross-sectional area of the transport flow path can be suppressed. That is, the accuracy of the fluid transportation amount can be increased.

  Application Example 2 The fluid transportation device according to the application example includes a pressing portion that is formed on the plurality of pressing members and presses the elastic member, and the pressing portion is perpendicular to the fluid flow direction of the groove. It preferably has a shape that follows the cross-sectional shape.

  By making the pressing portion of the pressing member into the shape as described above, the transport channel can be reliably closed.

  Application Example 3 In the fluid transport device according to the application example, it is preferable that the pressing portion has elasticity.

  If the pressing portion of the pressing member has elasticity, the shape of the pressing portion is easily adapted to the shape of the groove when pressing the elastic member, and there is an effect that the transport channel can be more reliably closed. .

  Application Example 4 In the fluid transport device according to the application example described above, it is preferable that the pressing portion has a flange portion that presses a peripheral surface of the groove to which the elastic member is fixed.

  When the transport channel is closed by the pressing member, it is conceivable that a very small space is formed at the boundary between the groove and the elastic member and cannot be closed. In such a case, the predetermined transportation amount may not be ensured, but by providing the above-described collar portion, the fixing boundary portion can be closed, and the predetermined transportation amount can be secured.

  Application Example 5 In the fluid transportation device according to the application example described above, it is preferable that a cross-sectional shape perpendicular to the fluid flow direction of the flow path wall constituting the groove has a substantially arc shape.

  The shape of the groove is not particularly limited and may be a quadrangle or a trapezoid. However, the groove shape can be simplified by making it substantially arc-shaped. Further, when the groove shape is a square or a trapezoid, a corner is formed at the intersection of the sides. When the transport channel is closed by the elastic member, it is considered that a very small gap is generated at the corner. Therefore, if the flow path wall is formed in a substantially arc shape, the gap is eliminated without forming a corner portion, and the transport flow path can be closed more reliably.

  Application Example 6 In the fluid transportation device according to the application example described above, the transportation flow path has a substantially symmetrical shape with respect to the peripheral surface of the groove to which the elastic member is fixed to the groove and the elastic member. Preferably it is formed.

  In such a configuration, the transport channel is constituted by a groove and an elastic member having a shape having a recess substantially the same as the cross-sectional shape of the groove. When the elastic member is a simple sheet, when the elastic member is pressed by the pressing member to close the transport flow path, the elastic member is pressed so as to be stretched. Therefore, the pressing force of the pressing member increases. However, if the elastic member has the same shape as the groove, the amount of stretching of the elastic member can be reduced, and the transport channel can be reliably closed even if the pressing force of the pressing member is small. Moreover, there exists an effect that durability of an elastic member improves.

  Application Example 7 In the fluid transportation device according to the application example, it is preferable that the transportation channel is formed on an outer peripheral side surface of the channel frame.

  If it does in this way, while forming a groove | channel easily, there exists an effect that the adhering operation | work of an elastic member becomes easy.

  Application Example 8 In the fluid transport device according to the above application example, the flow channel frame includes the transport flow channel and a fluid inflow channel and a discharge channel that pass through the flow channel wall forming the groove. Preferably, the inflow channel is disposed on the most upstream side of the transport channel, and the discharge channel is disposed on the most downstream side of the transport channel.

  According to such a configuration, rather than forming the inflow channel and the discharge channel on the extension of the arc-shaped transport channel, the inflow channel and the discharge channel can be formed in the channel frame by the holes. It is possible and the structure can be simplified. In addition, since the transport channel, the inflow channel, and the discharge channel can be formed only in the channel frame, in the case where the fluid to be transported is a chemical solution that is injected into the living body, the flow channel frame including components that come into contact with the chemical solution If it is used as a replacement, the safety can be improved and the other components can be used repeatedly and the running cost can be reduced.

  Application Example 9 In the fluid transportation device according to the application example described above, the rotating body is a cam, and the plurality of pressing members are arranged radially from the rotation axis direction of the cam and are pushed by the cam. It is preferable that it is a finger.

  According to such a configuration, the fluid can be transported by the peristaltic movement of the finger, and the finger presses the elastic member in the vertical direction, so that the rotational load of the cam is small and the component can be downsized. Miniaturization of the fluid transportation device can be realized.

FIG. 3 is a plan view showing a part of the fluid transportation device according to the first embodiment. (A) is a fragmentary sectional view which shows the A-P1-A cut surface of FIG. 1, (b) is a perspective view which shows a part of finger. FIG. 3 is a partial cross-sectional view showing a closed state of the transport channel according to the first embodiment. The fragmentary perspective view which shows the finger which concerns on the modification of Embodiment 1. FIG. The fluid transport apparatus which concerns on Embodiment 2 is shown, (a) is a fragmentary sectional view which shows the A-P1-A cut surface of FIG. 1, (b) is a perspective view which shows a part of finger. The fragmentary perspective view which shows the finger which concerns on the modification of Embodiment 2. FIG. FIG. 6 is a partial cross-sectional view showing a transport channel according to a third embodiment. FIG. 6 is a plan view showing a fluid transport device according to a fourth embodiment. Sectional drawing which shows the BB1-B cut surface of FIG. Sectional drawing which shows the D-P2-D cut surface of FIG. The finger which concerns on Embodiment 5 is shown, (a) is a front view which shows Example 1, (b) is a front view which shows Example 2. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Note that the drawings referred to in the following description are schematic views in which the vertical and horizontal scales of members or portions are different from actual ones for convenience of illustration. In addition, the fluid transport apparatus demonstrated in the following embodiment has illustrated the apparatus for inject | pouring a trace amount chemical | medical solution into a biological body at low speed.
(Embodiment 1)

  FIG. 1 is a plan view showing a part of the fluid transportation device according to the first embodiment, FIG. 2A is a partial cross-sectional view showing a cut surface A-P1-A in FIG. 1, and FIG. It is a perspective view which shows a part. FIG. 1 is a functional explanatory diagram showing the main functional elements in perspective. 1 and 2, a fluid transport device 1 includes a reservoir 11 for storing a chemical solution, a cam 20 as a rotating body, a flow channel frame 14 in which a fluid transport flow channel 15 is formed, and a transport flow channel 15. It is comprised from the several fingers 40-46 as a press member which are between the cams 20 and are arrange | positioned radially from the rotation axis P1 direction of the cam 20 at equal intervals.

  Although not shown, the fluid transport device 1 includes a drive device as a drive source, a transmission mechanism that transmits the drive of the drive device to the cam 20 at a predetermined reduction ratio, and a control circuit that controls the drive device. And a small battery as a power source for supplying power to the control circuit.

  The reservoir 11 is a resin container having elasticity such that the volume changes according to the amount of fluid contained, and is communicated with the transport channel 15 by a connecting pipe 81.

  The cam 20 has a disk shape, the outer peripheral side surface is a cam surface, and finger pressing surfaces 21a to 21d are formed on the outermost peripheral portion. The finger pressing surfaces 21a to 21d are formed on concentric circles that are equidistant from the rotation axis P1. The circumferential pitch and outer shape of the finger pressing surface 21a and the finger pressing surface 21b, the finger pressing surface 21b and the finger pressing surface 21c, the finger pressing surface 21c and the finger pressing surface 21d, and the finger pressing surface 21d and the finger pressing surface 21a are equal. Is formed.

  The cam 20 is rotatably supported by the first machine frame 12 and the second machine frame 13 while being fixed to the cam shaft 75 together with the cam gear 76 (see FIG. 2A). The cam 20 transmits the rotation of the driving device described above to the cam 20 via the cam gear 76, and the cam 20 rotates in the direction of arrow R about the rotation axis P1 (see FIG. 1).

  Each of the finger pressing surfaces 21a to 21d is formed with a finger pressing slope 22 and a concentric circular arc portion 23 centering on the rotation axis P1. The arc portion 23 is provided at a position where the fingers 40 to 46 are not pressed.

  In addition, one end of each of the finger pressing surfaces 21a, 21b, 21c, and 21d and the arc portion 23 are connected by a linear portion 24 that extends from the rotation axis P1.

  The fluid transport channel 15 is formed on the outer peripheral side surface of the channel frame 14, and seals the arc-shaped groove 16 concentric with the rotation axis P <b> 1 of the cam 20 and the opening of the groove 16 in the direction facing the cam 20. And a sheet-like elastic member 90 to be stopped. The groove 16 is formed by the flow path wall 16c and the slope portions 16a and 16b, and the trapezoidal shape is illustrated in the present embodiment. Note that the end of the transport channel 15 on the reservoir 11 side communicates with the inflow channel 17, and the other end communicates with the discharge channel 18. The inflow channel side is represented as the upstream side, and the discharge channel side is represented as the downstream side.

  The elastic member 90 is fixed to the peripheral surface 16d of the groove 16 described above, and seals the opening of the groove 16 on the cam 20 side. The transport channel 15 is constituted by the groove 16 and the elastic member 90.

  The elastic member 90 has elasticity that can be deformed until the fingers 40 to 46 are in close contact with the flow path wall 16c and the slope portions 16a and 16b. Further, the elastic member 90 has an elastic force that moves the fingers 40 to 46 in the direction of the rotation axis P <b> 1 to the position at which the transport channel 15 is opened when the pressing state of the fingers 40 to 46 by the cam 20 is released.

  As shown in FIG. 1, the transport channel 15 is formed at least in a range from the pressing range of the finger 40 on the most upstream side to the pressing range of the finger 46 on the most downstream side. The most downstream side communicates with the discharge flow path 18.

  Each of the inflow channel 17 and the discharge channel 18 forms a groove from the upper surface side of the channel frame 14 and is sealed by the second machine frame 13. In addition, it is good also as a structure sealed using sealing members other than the 2nd machine casing 13. FIG. The inflow channel 17 communicates with the reservoir 11 via the connection pipe 81. Further, the discharge flow path 18 is led out of the fluid transport apparatus 1 through the connection pipe 82. When injecting a chemical solution into a living body, an injection tube (not shown) is further inserted into the connection pipe 82.

  Next, the shape of the fingers 40 to 46 will be described with reference to FIG. Since the fingers 40 to 46 have the same shape, the finger 44 will be described as an example. 2A shows a state in which the finger 44 does not press the elastic member 90, that is, a state in which the transport channel 15 is opened. The finger 44 includes a rod-shaped shaft portion 44a, a pressing portion 44c formed on the elastic member 90 side of the shaft portion 44a, and a cam contact portion 44b formed on the cam 20 side. The cross-sectional shape of the shaft portion 44a is square or circular, and the cam contact portion 44b is smoothly rounded.

  In addition, although the cross-sectional shape of the axial part 44a may be circular or square, in the case of a square, the cam contact part 44b is smoothly rounded into a substantially circular shape in plan view.

  As shown in FIG. 2B, the pressing portion 44c has a substantially quadrangular bowl shape, and includes a pressing surface 44d that is concentric with the flow path wall 16c, and slope portions 44e and 44f having the same angle as the slope portions 16a and 16b. Have. Therefore, the pressing portion 44c (the pressing surface 44d and the slope portions 44e and 44f) has a shape (substantially similar) following the transport channel 15 (the channel wall 16c and the slope portions 16a and 16b).

  The fingers 40 to 46 are mounted in finger mounting grooves 12 a formed in the first machine casing 12, and are covered by the second machine casing 13 so as to be movable forward and backward in the axial direction. Note that the fingers 40 to 46 may be held using a dedicated holding member other than the second machine casing 13.

Next, the blockage of the transport channel 15 will be described with reference to FIG.
FIG. 3 is a partial cross-sectional view illustrating a closed state of the transport channel according to the first embodiment. The finger 44 will be described as an example. Reference is also made to FIG. When the finger 44 reaches a position where the finger pressing surface 21 d of the cam 20 pushes the finger 44, the elastic member 90 closes the transport channel 15 by the pressing portion 44 c of the finger 44. When the cam 20 further rotates and the engagement between the finger pressing surface 21d and the cam contact portion 44b is released, the finger 44 is pushed back to the cam 20 side by the elastic force of the elastic member 90, and the transport channel 15 is opened. (The state shown in FIG. 2A).

  Then, the effect | action which concerns on the fluid transport of a fluid transport apparatus is demonstrated with reference to FIGS. 1-3. The cam 20 rotates the cam gear 76 via a drive device and a transmission mechanism that transmits the drive of the drive device to the cam 20 at a predetermined reduction ratio. Since the cam gear 76 is integrated with the cam 20, the cam 20 is rotated in the arrow R direction and pushes the finger 44 with the finger pressing surface 21 d. At this time, the finger 44 deforms the elastic member 90 and closes the transport channel 15.

  The finger 45 is in contact with the joint portion between the finger pressing surface 21 d and the finger pressing slope 22 and closes the transport channel 15. Further, the finger 46 presses the elastic member 90 on the finger pressing slope 22 but is smaller than the pressing amount of the finger 44 and does not completely close the transport channel 15.

The fingers 40 to 43 are in the range of the arc portion 23 of the cam 20 or the finger pressing slope 22 and are in an initial position where they are not pushed.
When the cam 20 is further rotated in the arrow R direction from this position, the fingers 45 and 46 are pushed in this order by the finger pressing surface 21d of the cam 20 to close the transport channel 15. The finger 44 is released from the finger pressing surface 21d, and the transport channel 15 is opened. The fluid flows into the transport channel 15 at a position where it is opened or not yet closed.

  When the cam 20 is further rotated, the finger pressing inclined surface 22 sequentially presses the fluid from the upstream side to the downstream side in the order of the fingers 40, 41, 42, and 43, and the transport flow path 15 when reaching the finger pressing surface 21c. Occlude.

  By repeating such an operation, the fluid is transported from the reservoir 11 toward the discharge flow path 18 and discharged.

  Therefore, according to the present embodiment, the transport channel 15 is constituted by the groove 16 formed in the channel frame 14 and the sheet-like elastic member 90. The groove 16 can be formed with high accuracy by means such as injection molding, and the sheet-like elastic member 90 has little influence on the dimensional variation of the transport channel 15 compared to the inner diameter accuracy of a conventional tube having elasticity. Therefore, the cross-sectional area accuracy of the transport channel 15 is improved, and the variation in the transport amount of the fluid due to the variation in the cross-sectional area of the transport channel 15 can be suppressed. That is, the accuracy of the fluid transportation amount can be increased.

  Moreover, since each pressing part (illustrating the pressing part 44c) of the fingers 40 to 46 has a shape that follows the groove 16 (the channel wall 16c and the slope parts 16a and 16b) of the transport channel 15, The elastic member 90 is in close contact with the inner wall of the groove 16, and the transport channel 15 can be closed without a gap.

  Further, as shown in FIG. 1, the transport channel 15 is formed on the outer peripheral side surface of the channel frame 14. In this way, when the flow path frame 14 is formed by injection molding, the groove 16 can be formed with high accuracy, and the groove can be cut. In addition, there is an effect that the fixing operation of the elastic member 90 becomes easy.

The technical idea of this embodiment can be applied to a structure in which a plurality of fingers are replaced with a plurality of rollers described in Patent Document 2, but when the transport channel is closed by the rollers, the elastic member is made of a fluid. It may be stretched and deformed in the transport direction (rotating body rotation direction). However, this embodiment has a feature that the elastic member is not deformed as described above because the elastic member is pressed in a substantially vertical direction by the finger.
(Modification of Embodiment 1)

Subsequently, a modification of the first embodiment will be described with reference to the drawings. This modification is characterized in that each pressing portion of the fingers 40 to 46 has a flange portion that presses the peripheral surface 16d of the groove 16 to which the elastic member 90 is fixed. Differences from FIG. 2B will be described by assigning the same reference numerals to the same functional units as those in FIG.
FIG. 4 is a partial perspective view showing a finger according to a modification of the first embodiment. In addition, the finger 44 is illustrated among several fingers. In the finger 44, a pressing portion 44c is formed at the tip of the shaft portion 44a.

  The pressing portion 44c has a pressing surface 44d that is concentric with the flow path wall 16c, and slope portions 44e and 44f having the same angle as the slope portions 16a and 16b, and further, flange portions 44g and 44h that are continuous with the slope portions 44e and 44f. have. The pressing surface 44d and the slope portions 16a and 16b have the same shape as that of the first embodiment (see FIG. 2B).

  The flange portions 44g and 44h are provided so as to protrude in a range where at least a part of the peripheral surface 16d of the groove 16 to which the elastic member 90 is fixed is pressed. Therefore, the planar view shape of the flange portions 44g and 44h on the elastic member 90 side has a shape that is concentric with the peripheral surface 16d.

When the transport flow path 15 is closed by any of the fingers 40 to 46, it is conceivable that a very small gap is formed at the fixing boundary between the groove 16 and the elastic member 90 and cannot be completely closed. In such a case, the predetermined transport amount may not be ensured. However, by providing the flanges 44g and 44h as described above, the fixing boundary portion can also be closed, and the above-described gap can be eliminated and the predetermined fluid transport amount can be reduced. It can be secured. Further, when the elastic member 90 is pressed, there is an effect of reinforcing the fixing strength of the elastic member 90.
(Embodiment 2)

  Next, Embodiment 2 will be described with reference to the drawings. Embodiment 2 is characterized in that the cross-sectional shape perpendicular to the fluid flow direction of the flow path wall of the transport flow path has an arc shape. Therefore, the same functional parts will be described with the same reference numerals, centering on the differences from the first embodiment. In addition, the finger 44 is illustrated.

  5A and 5B show a fluid transport device according to the second embodiment, in which FIG. 5A is a partial cross-sectional view showing a cut surface A-P1-A in FIG. 1, and FIG. 5B is a perspective view showing a part of a finger. 5A and 5B, the transport channel 15 is formed by the groove 16 formed in the channel frame 14 and the elastic member 90. The groove 16 is formed by a flow path wall 16c having a circular cross section.

  The finger 44 includes a rod-shaped shaft portion 44a, a pressing portion 44c formed on the elastic member 90 side of the shaft portion 44a, and a cam contact portion 44b formed on the cam 20 side. As shown in FIG. 5B, the pressing portion 44 c has a substantially quadrangular bowl shape, and has a pressing surface 44 d that follows the shape of the flow path wall 16 c. Specifically, the pressing surface 44d is composed of a curved surface obtained by combining a circular arc concentric with the flow path wall 16c and a circular arc shape of the cross section of the flow path wall 16c in plan view.

When the transport channel 15 has a quadrangular or trapezoidal cross-sectional shape as in the first embodiment, a corner is formed at the intersection of the sides forming the transport channel 15 and at the fixing boundary with the elastic member 90. When these corners are closed by the elastic member 90, it is considered that minute gaps are generated. If such a gap is generated, an error or fluctuation occurs in the fluid transport amount. Therefore, if the cross-sectional shape of the flow path wall 16c is substantially arcuate, the transport flow path 15 can be more reliably closed without forming corners, and an accurate fluid transport amount can be maintained.
(Modification of Embodiment 2)

  Subsequently, a modification of the second embodiment will be described with reference to the drawings. Similarly to the modification of the first embodiment, each pressing portion of the fingers 40 to 46 has a flange portion that presses the peripheral surface 16d of the groove 16 to which the elastic member 90 is fixed. Differences from the second embodiment (see FIG. 5B) will be described with the same reference numerals as those in FIG. 5B.

  FIG. 6 is a partial perspective view showing a finger according to a modification of the second embodiment. In addition, the finger 44 is illustrated among several fingers. As for the finger 44, the press part 44c is formed in the front-end | tip part of the axial part 44a. The pressing portion 44c has a pressing surface 44d having the same shape as that of the second embodiment described above, and flanges 44g and 44h continuous with the pressing surface 44d.

  The flange portions 44g and 44h are provided so as to protrude in a range in which at least a part of the peripheral surface 16d (see FIG. 5) of the groove 16 to which the elastic member 90 is fixed is pressed. Therefore, the planar view shapes of the flange portions 44g and 44h have shapes that are concentric with the peripheral surface 16d.

With such a structure, it is possible to realize the fluid transport device 1 having the effect of eliminating the corners of the second embodiment described above and the effect of having the flange portions 44g and 44h according to the modification of the first embodiment. .
In addition, since the shape can be simplified if the flow path wall 16c is formed in a substantially circular arc shape, and the manufacturing becomes easier, the dimensional accuracy is also improved.
(Embodiment 3)

  Next, Embodiment 3 will be described with reference to the drawings. In the first embodiment and the second embodiment described above, the elastic member forming the transport channel is in the form of a sheet, whereas the transport channel has a groove formed in the channel frame and the elastic member. It is characterized by being formed so as to be substantially symmetrical with respect to the peripheral surface. Therefore, differences between the first embodiment and the second embodiment will be described.

  FIG. 7 is a partial cross-sectional view showing a transport channel according to the third embodiment. The transport channel 15 is formed by a groove 16 formed of a channel wall 16 c having an arc-shaped cross section formed in the channel frame 14 and a recess 91 of the elastic member 90. The concave portion 91 can be formed by heat-pressing or injection molding the sheet-like elastic member 90. The flow path wall 16 c of the flow path frame 14 and the recess 91 of the elastic member 90 have shapes that are substantially symmetrical with respect to the peripheral surface 16 d of the groove 16.

  In FIG. 7, the finger 44 according to the second embodiment is illustrated as a finger for closing the transport flow path 15, and the cross-sectional shape of the pressing surface 44 d of the pressing portion 44 c is configured by a curved surface that follows the flow path wall 16 c. Has been.

  Here, when the elastic member 90 is pressed by the finger 44, the surface of the recess 91 comes into close contact with the flow path wall 16c, and the transport flow path 15 is closed.

  In FIG. 7, the pressing surface 44 d has an arc shape (curved surface) according to the second embodiment, but may have a trapezoidal shape according to the first embodiment. In addition, it is more preferable that the flanges 44g and 44h according to the modified examples of the first and second embodiments are also provided.

In such a configuration, the transport channel 15 is configured by the recess 91 of the elastic member 90 that is substantially symmetric with the cross-sectional shape of the channel wall 16. When the elastic member 90 is a simple sheet-like member, when the elastic member 90 is pressed with a finger to close the transport channel 15, the elastic member 90 is pressed so as to be stretched. Therefore, the pressing force of the elastic member 90 increases. However, if the recess 91 is provided in the elastic member 90, the amount of stretching when the elastic member 90 is closed can be reduced, and the transport channel 15 can be reliably closed even if the pressing force of the fingers 40 to 46 is small. In addition, the durability of the elastic member 90 is improved.
(Embodiment 4)

  Next, a fourth embodiment will be described with reference to the drawings. In the first embodiment described above, the inflow channel 17 and the discharge channel 18 communicate with each other on the extension of the transport channel 15, whereas the fourth embodiment is substantially perpendicular to the transport channel 15. The inflow channel 17 and the discharge channel 18 are in communication with each other. Therefore, it demonstrates centering on a different location from Embodiment 1. FIG. In addition, the same code | symbol is attached | subjected to the element which has the same function as Embodiment 1. FIG.

  8 is a plan view showing a fluid transportation device according to Embodiment 4, FIG. 9 is a cross-sectional view showing a B-P1-B cut surface of FIG. 8, and FIG. 10 is a cross-sectional view showing a D-P2-D cut surface. is there. The transport channel 15 and the fingers 40 to 46 are exemplified by the first embodiment. 8 and 9, the inflow channel 17 communicates with the transport channel 15 and the fluid reservoir 19a through a hole penetrating the channel wall 16c at the position in the extension direction of the finger 40 on the most upstream side of the transport channel 15. Has been.

  The fluid reservoir 19 a communicates with the reservoir 11 through a connection pipe 81. The fluid reservoir 19 a is formed by opening the hole 19 from the vertically upper side of the inflow channel 17 and sealing the inflow channel 17 with the sealing member 83 while ensuring the cross-sectional area.

The connecting pipe 81 has a two-stage structure, the thin tube portion is connected to the fluid reservoir 19a, and the connecting portion 81a projecting from the reservoir 11 is connected to the connecting portion 81a of the thick tube portion connected to the reservoir 11. Yes. With such a structure, the reservoir 11 and the transport channel 15 communicate with each other. The connecting pipe 81 is inserted substantially perpendicularly to the side wall 14b of the flow path frame 14.
In addition, the opening position of the inflow channel 17 should just be upstream from the finger 40 of the transport channel 15, and is not limited to the illustrated position.

  Then, the structure of the discharge flow path 18 is demonstrated. 8 and 10, the discharge flow path 18 is formed by a hole penetrating the flow path wall 16c at the position in the extending direction of the finger 46 on the most downstream side of the transport flow path 15. The discharge flow path 18 is configured by a hole that is opened substantially perpendicularly to the outer peripheral side wall 14 a of the flow path frame 14, and a connection pipe 82 is inserted and extends to the outside.

  Note that the connection pipe 82 may have a structure similar to that of the connection pipe 81 on the inflow channel side, and may have a structure that directly communicates with the transport channel 15. Moreover, the opening position of the discharge flow path 18 should just be downstream from the finger 46 of the transport flow path 15, and is not limited to the illustrated position.

  Therefore, in this embodiment, the transport flow path 15 including the elastic member 90 in the flow path frame 14, the inflow flow path 17 including the connection pipe 81, and the discharge flow path 18 including the connection pipe 82 are unitized. In addition, the reservoir 11 is connected.

According to such a configuration, the inflow channel 17 and the discharge channel 18 can be formed in the channel frame 14 by holes, and the structure can be simplified. Further, since the transport flow path 15, the inflow flow path 17 and the discharge flow path 18 can be formed in the flow path frame 14, in the case where the transport target fluid is a chemical liquid to be injected into the living body, a flow path frame unit that contacts the chemical liquid The replacement can be used for improving safety, and if other components are used repeatedly, the running cost can be reduced.
(Embodiment 5)

Subsequently, a fluid transportation device according to Embodiment 5 will be described with reference to the drawings. The fifth embodiment relates to the configuration of the fingers and is characterized in that the pressing portion that presses the elastic member has elasticity.
FIG. 11: is a front view which shows the finger which concerns on Embodiment 5, (a) has shown Example 1, (b) has shown Example 2. FIG.

  First, Example 1 will be described. Since the seven fingers have the same shape, they will be described as fingers 60. The finger 60 includes a shaft portion 61 and a bowl-shaped pressing portion 62. The pressing portion 62 is made of an elastic material, and the shaft portion 62 a is inserted into the hole portion 61 a opened at one end of the shaft portion 61.

  The shaft portion 61 has such a rigidity that it does not deform when the transport channel 15 is closed by the cam 20. Further, it is desirable that the pressing portion 62 has an elasticity that is compatible with the shape of the flow path wall 16 when the transport flow path 15 is closed.

  Next, Example 2 will be described. The finger 60 is formed by two types of molding of a shaft portion 61 and a bowl-shaped pressing portion 62. The pressing portion 62 is an elastic material, and the shaft portion 61 has a rigidity that does not deform when the transport channel 15 is closed by the cam 20.

  In Example 1 and Example 2 mentioned above, since the pressing part 62 of the finger 60 has elasticity, when the transport channel 15 is closed, the channel wall 16c of the transport channel 15 and the slopes 16a and 16b. The shape of the pressing part 62 is easy to be adapted to the shape, and the transport channel can be more reliably closed.

  In addition, since the pressing portion 62 has elasticity, it is possible to absorb fluctuations in dimensions of the finger including the cam 20 and the transport flow path 15 and prevent the drive from being stopped due to overload.

  In addition, in FIG. 11, the structure by Embodiment 1 was illustrated, However, It can apply also to the structure by Embodiment 2, and each modification.

  Furthermore, the fluid transport device 1 according to the first to fifth embodiments presses the elastic member 90 constituting the transport flow path 15 by the cam 20 as the rotating body and the fingers 40 to 46 as the pressing members, The structure for transporting the fluid by the peristaltic motion of the fingers 40 to 46 has been described as an example. However, the tube is pressed from the upstream side to the downstream side by a plurality of rollers attached to the rotating body as in Patent Document 2 described above. The present invention can also be applied to a structure for delivering a liquid.

  In the structure by patent document 2, it can implement | achieve by forming the press part of the shape which followed the transport flow path on the rotation side surface of a some roller.

  In addition, since the fluid transport apparatus 1 according to Embodiments 1 to 5 described above can be reduced in size and thickness and can continuously transport a small amount of flow at a low speed, the fluid transport apparatus 1 is mounted on the living body or on the surface of the living body. However, it is suitable for medical use such as development of new drugs and drug delivery. Moreover, in various mechanical devices, it can be mounted in the device or outside the device and used for transporting fluids such as water, saline, chemicals, oils, fragrances, inks and gases.

  DESCRIPTION OF SYMBOLS 1 ... Fluid transport apparatus, 14 ... Channel frame, 15 ... Transport channel, 16 ... Channel wall, 20 ... Cam, 40-46 ... Finger, 90 ... Elastic member.

Claims (8)

A driving device;
A fluid transport channel formed by a groove formed in the channel frame and an elastic member sealing the groove;
A pressing member that deforms the elastic member by driving the driving device and closes a part of the transport channel;
Have
The fluid transport device according to claim 1, wherein the elastic member has a concave portion in a direction opposite to a direction in which the groove is formed with respect to a peripheral surface of the groove to which the elastic member is fixed. The fluid transport device according to claim 1,
A fluid transportation device configured to deform the elastic member so as to be stretched when the elastic member is deformed by the pressing member to close a part of the transportation flow path. The fluid transport device according to claim 1,
The fluid transport device according to claim 1, wherein the groove and the elastic member in the transport channel are formed so as to be substantially symmetrical with respect to the peripheral surface. The fluid transport device according to any one of claims 1 to 3,
A fluid transporting device, wherein a pressing portion formed on the pressing member and pressing the elastic member has a shape following the groove. The fluid transport device according to claim 4, wherein
The fluid transporting device, wherein the pressing portion has elasticity. The fluid transport device according to any one of claims 1 to 5,
The fluid transport device according to claim 1, wherein the groove is formed in an arc shape in the flow channel frame. The fluid transport device according to any one of claims 1 to 6,
The fluid transportation device, wherein the transportation channel is formed on an outer peripheral side surface of the channel frame. The fluid transport device according to any one of claims 1 to 7,
The flow path frame has an inflow flow path and a discharge flow path communicating with the transport flow path;
The fluid transport device according to claim 1, wherein the inflow channel is disposed on the most upstream side of the transport channel, and the discharge channel is disposed on the most downstream side of the transport channel.

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