JP2014141883A - Fluid supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reliable fluid supply device capable of preventing counterflow of fluid when supplying fluid with the usage of a tube.SOLUTION: In a fluid supply device 10, a reduction volume V of a hollow passage 43 by newly pressing a tube 40 by upstream side pressing pins 62-64 on the downstream side of an upstream side prescribed pressing pin 61 in the state that the hollow passage 43 is closed by pressing the tube 40 by the upstream side prescribed pressing pin 61 is substantially equivalent to an increase volume W of the hollow passage 43 by newly opening the tube 40 from the pressed state by the downstream side pressing pins 76-74 disposed so as to be separated on the downstream side of the upstream side pressing pins 62-64.

Description

  The present invention relates to a fluid supply apparatus, and more particularly to a structure of a fluid supply apparatus suitable for a case where a chemical solution (fluid) is supplied into the body of an animal by being implanted under the skin of an animal such as an experimental animal.

2. Description of the Related Art Conventionally, experiments and verification of the efficacy of a chemical solution using small animals such as mice and guinea pigs have been performed, and various chemical solution (fluid) supply devices for supplying the chemical solution to small animals have been proposed.
In the fluid supply device, the fluid may flow backward to the fluid supply device immediately after supplying the fluid to the supply destination. For this reason, attempts have been made to reduce the backflow.

Patent Document 1 discloses a micropump that reduces the backflow. 22 and 23 are plan views of the main part of the micropump of Patent Document 1. FIG.
22 and 23, 920 is a rotating cam that rotates in the direction of arrow R, 940 to 946 are fingers, 950 is an elastic tube, an inlet portion 952 for inflowing fluid, and an outlet portion 953 for discharging fluid. have. The rotating cam 920 has an outer peripheral surface formed in a concavo-convex shape so as to contact the fingers 940 to 946 and close or open the tube 950. This outer peripheral surface has finger pressing inclined surfaces 922a (positioned on the discharge port portion 953 side in FIG. 22), 922d (positioned on the same inlet portion 952 side), finger pressing surfaces 921c (located on the same inlet portion 952 side). Position)) and 921d (position on the discharge port portion 953 side). The fingers include a finger 940 disposed closest to the inflow port portion 952, and a finger 941, a finger 942, a finger 943, a finger 944, a finger 945, and a finger 946 sequentially disposed on the discharge port portion 953 side with respect to the finger 940. doing. The finger 946 is disposed closest to the discharge port portion 953.

  In FIG. 22, the finger pressing inclined surface 922d of the rotating cam 920 presses the fingers 941, 942, and 943 in that order. At this time, the finger 940 is pushed by the finger pressing surface 921 c to close the tube 950. At the same time, the finger 946 is pushed by the finger pressing surface 921d to close the tube 950. For this reason, the fluid in the tube between the finger 940 and the finger 946 is sealed. When the rotating cam 920 rotates in the direction of the arrow R from this state and reaches the position shown in FIG. 23, the finger 946 is disengaged from the finger pressing surface 921d, and the tube 950 is released from the closed state due to its elastic force and returns to the initial state. At this time, according to Patent Document 1, the inner volume of the deformed portion range V1 of the tube 950 deformed by the finger 946 as shown in FIG. 22 and the inner volume of the tube 950 opened by the finger 946 as shown in FIG. The fluid flows backward due to the difference between

  Therefore, the invention of Patent Document 1 makes the tube pressing amount that presses the tube 950 by the finger 946 arranged closest to the discharge port portion 953 smaller than the tube pressing amount that presses the tube by the other fingers 940 to 945. Is. For example, the diameter of the tube pressing part in the finger 946 is made smaller than the diameter of the tube pressing part of the other fingers 940-945. Thereby, the difference of the said internal volume becomes small compared with the case where the diameter of the tube press part of the finger 946 is formed identically with the diameter of the tube press part of the other fingers 940-945, and it can reduce a back flow rate. Is.

JP 2009-228425 A

  However, Patent Document 1 cannot prevent the backflow of fluid. For this reason, an accurate fluid volume cannot be supplied to a supply destination (for example, the inside of a laboratory animal or the like). In addition, when the fluid once supplied to the supply destination mixes with the other fluid of the supply destination (for example, the body fluid of the laboratory animal) and flows backward, it accumulates in the tube and contaminates and alters the fluid supplied in the future. In addition, the concentration of the fluid may be changed. For this reason, the reliability of fluid supply is impaired.

The present invention solves the above-described problems, and an object of the present invention is to substantially prevent backflow of a fluid supplied to a supply destination and to provide a highly reliable fluid supply device.

(1) The fluid supply device of the present invention includes a tube made of an elastic body having a hollow passage through which a fluid can flow, a pressing direction for pressing the tube, and a plurality of movable in an opening direction opposite to the pressing direction. And a pressing pin moving device that allows the pressing pin to move in the pressing direction and the opening direction, and each of the pressing pins sequentially moves in the pressing direction and the releasing direction by the pressing pin moving device. Then, the fluid supply device is configured to supply the fluid in the hollow passage toward the downstream side of the tube by opening the hollow passage from the closed state and the closed state. An upstream pressing pin disposed downstream of the upstream predetermined pressing pin in a state where the upstream predetermined pressing pin disposed at a position presses the tube and closes the hollow passage. The reduced capacity of the hollow passage by newly pressing the tube is determined by the fact that the downstream side pressing pin, which is arranged downstream from the upstream side pressing pin, newly opens the tube from the pressed state. Characterized by substantially equal to the increased capacity of the hollow passage

According to the present invention, with the upstream predetermined pressing pin among the pressing pins pressing the tube and closing the hollow passage, the reduced capacity of the hollow passage due to the upstream pressing pin newly pressing the tube is reduced downstream. The side pressing pin is substantially equal to the increased capacity of the hollow passage by newly releasing the tube from the pressed state. For this reason, it becomes possible to substantially prevent the fluid supplied to the supply destination from flowing back into the fluid supply apparatus.

The inventor of the present invention has conducted extensive analysis on the backflow of the fluid supply apparatus as disclosed in Patent Document 1, and as a result, has found that the backflow occurs in the following situation.
For example, in Patent Document 1, when the rotating cam 920 rotates in the direction of arrow R and reaches the position shown in FIG. 22, the most upstream finger 940 is pushed by the finger pressing surface 921c to close the tube 950. Simultaneously with the closing, the most downstream finger 946 is pushed by the finger pressing surface 921d to close the tube 950. For this reason, the fluid is sealed in the tube between the finger 940 and the finger 946. When the rotating cam 920 further rotates in the direction of arrow R from this fluid sealed state and reaches the position of FIG. 23, the finger 946 is disengaged from the finger pressing surface 921d, and the tube 950 is unblocked by its elastic force. And return to the initial state (released). At the same time, the finger 941 disposed closer to the discharge port 953 than the finger 940 rides on the finger pressing surface 921c and pushes the tube 950 to close the tube 950. At this time, the finger 942 disposed closer to the discharge port 953 than the finger 941 also presses the tube 950 in the closing direction by the finger pressing inclined surface 922d. At the same time, the finger 943 disposed on the discharge port 953 side of the finger 942 also presses the tube 950 in the closing direction by the finger pressing inclined surface 922d.

That is, at the finger 940 position, the tube 950 in FIGS. 22 and 23 is closed, but at the finger 946 position, the tube closed state in FIG. 22 is changed to the tube open state in FIG.
Here, the capacity change in the tube from the tube closing position at the finger 940 position to the discharge port portion 953 side will be considered. In FIG. 23, since the finger 946 has opened the tube 950, the capacity | capacitance in a tube increases only by the press deformation capacity | capacitance in the tube of the V1 range of FIG. This increased volume in the tube leads to a negative pressure in the tube. On the other hand, when changing from FIG. 22 to FIG. 23, the fingers 941 to 943 newly press the tube 950 by the finger pressing inclined surface 922d, and the volume in the tube decreases. This reduced volume in the tube leads to a positive pressure in the tube.

Therefore, the inventor of the present invention shows that the reverse flow is caused by the increase in volume (negative pressure) in the tube 950 due to the finger 946 opening the tube 950 from FIG. 22 to FIG. It has been found that it is generated by being larger than the reduced volume (positive pressure) in the tube 950 due to new pressing. That is, from FIG. 22 to FIG. 23, since the negative pressure exceeds the positive pressure in the tube 950 from the tube closing position at the finger 940 position to the discharge port portion 953 side, the discharge port portion of the tube 950 becomes negative pressure. 953 is a phenomenon in which the fluid supplied to the outside flows backward.

Based on the discovery of this phenomenon, the inventor of the present invention can equalize the positive pressure and the negative pressure by making the decrease capacity substantially equal to the increase capacity, and is supplied to the supply destination by the tube. The present inventors have found that the fluid does not flow back into the fluid supply device, and have reached the present invention.

According to the present invention, since the fluid supplied to the supply destination does not flow back into the fluid supply device, an accurate fluid flow rate can be reliably supplied to the supply destination (for example, the body of a laboratory animal or the like). . In addition, it is possible to prevent the fluid once supplied to the supply destination from flowing backward while being mixed with other fluids of the supply destination (for example, body fluids of experimental animals). For this reason, it is possible to prevent the fluid accumulated in the tube and supplied in the future as in the case of backflow from being contaminated and altered, and changing the concentration of the fluid. Therefore, the fluid supply device of the present invention can increase the reliability of fluid supply.

The blockage of the present invention means a state in which the tube is crushed and fluid cannot substantially flow through the hollow passage of the tube, and the opening means that the crushing of the tube is released and the inside of the hollow passage is released. The state in which the fluid can be circulated means that the completion of the opening means that the crushing is released and the tube returns to a natural state.
Further, if the tube is repeatedly pressed and released by the pressing pin many times, the tube may be bent or a “sagging phenomenon” that cannot be completely restored to the initial state may occur. In that case, the new reduced capacity V of the hollow passage on the way the upstream pressing pin sags and presses the subsequent tube in sequence, the opening of the hollow passage of the tube after the downstream pressing pin sags is completed. If it is substantially equal to the increased capacity of the hollow passage, the reverse flow of the fluid can be prevented and is included in the present invention.

Further, the upstream side pressing pin of the present invention is a pressing pin that is arranged on the downstream side of the upstream predetermined pressing pin, and that is positioned on the relatively upstream side among the pressing pins, and the upstream predetermined pressing pin connects the tube. In the state which pressed and closed the hollow channel | path, the press pin which can press a tube newly is pointed out. The downstream-side pressing pin of the present invention is a pressing pin that is disposed on the downstream side of the upstream-side pressing pin and is relatively downstream of the pressing pins, and the upstream predetermined pressing pin is the tube. Is a pressing pin that can newly open the tube from the pressed state with the hollow passage closed.
The upstream side of the present invention is the side close to the upstream when the fluid flows in the tube, and in the tube, refers to the side close to the inlet. The downstream side of the present invention is a side close to the downstream when the fluid flows in the tube, and in the tube, indicates a side close to the outlet.

That the reduced capacity is substantially equal to the increased capacity does not only mean that the decreased capacity and the increased capacity are exactly the same, but also includes that one has some difference with respect to the other. The slight difference indicates that one of the reduced capacity and the increased capacity is within 15 percent, preferably within 10 percent, more preferably within 5 percent relative to the other. For example, when the reduced capacity exceeds 15% with respect to the increased capacity, the fluid pressure supplied to the downstream side may become too large, and the supply destination may be overloaded. When the increased capacity exceeds 15% with respect to the decreased capacity, the back flow substantially occurs, making it difficult to solve the above-described problem. For this reason, one of the reduced capacity and the increased capacity is required to be within 15 percent, preferably within 10 percent, more preferably within 5 percent relative to the other.

The fluid of the present invention may be liquid or gas. For example, as the liquid, a chemical solution for animal experiments, a therapeutic agent for human body treatment, a fertilizer solution for plant cultivation, a chemical solution for chemical experiments, and the like can be used. As the gas, a gas for chemical experiments or the like can be used.

(2) In the fluid supply device of the present invention, the upstream predetermined pressing pin presses the tube to close the hollow passage, and the downstream predetermined pressing pin disposed at a predetermined position on the downstream side of the pressing pin. Starting from the time when the upstream second pressing pin arranged immediately downstream of the upstream predetermined pressing pin starts to press the tube in a state where the tube is pressed and the hollow passage is closed. Each of the upstream pressing pins including the upstream second pressing pin and a pressing pin disposed downstream of the upstream second pressing pin in a state where the predetermined pressing pin closes the hollow passage is In the course of sequentially pressing the tube, all of the downstream pressure pins that press the tube including the downstream predetermined pressure pin and a pressure pin arranged on the upstream side of the downstream predetermined pressure pin. When the end of the opening of the hollow passage by releasing the tube from the pressed state is an end point, the hollow passage is reduced by the upstream pressing pin pressing the tube between the start point and the end point. The capacity is preferably substantially equal to the increased capacity of the hollow passage upon completion of opening of the hollow passage by the downstream pressing pin.

According to the present invention, the reduced capacity of the hollow passage is between the start point at which the upstream second pressing pin starts to press the tube and the end point when the opening of the hollow passage by all of the downstream pressing pins is completed. It is substantially equal to the increased capacity. For this reason, it is possible to reliably prevent the fluid supplied to the supply destination from flowing back into the fluid supply apparatus.

(3) The fluid supply device according to the present invention is the fluid supply device according to any one of (1) to (2), in which the pressing pin moving device moves each of the pressing pins in the pressing direction and the It is preferable that a rotation cam that can move in the opening direction and a rotation drive device that rotates the rotation cam in a predetermined direction are provided.

According to the present invention, since the rotary cam is rotationally driven in a predetermined direction by the rotary drive device, each of the pressing pins can be reliably moved in the pressing direction and the opening direction by the rotating cam. In addition, the rotating cam can be easily and precisely manufactured by injection molding or machining, the movement stroke of each pressing pin can be maintained with high accuracy, and the manufacturing cost can be reduced. When each of the pressing pins is moved in the opening direction by the rotating cam, the tube is restored by its own elastic force. When this opening is completed, the tube returns to its original shape.

(4) The fluid supply device of the present invention is the fluid supply device described in (3), in which the rotating cam includes a convex portion that allows the pressing pin to move in the pressing direction, and the pressing pin. It is preferable to have a concave portion that can move in the opening direction by an elastic force of the tube, and an inclined portion formed between the convex portion and the concave portion.

  According to the present invention, since the rotating cam includes the convex portion, the concave portion, and the inclined portion, the height of each pressing pin after moving in the pressing direction by the convex portion can be maintained, and the moving portion moves in the opening direction by the concave portion. The depth of each subsequent pressing pin can be maintained, and each pressing pin can smoothly move in the pressing direction and the opening direction by the inclined portion.

(5) The fluid supply device according to the present invention is the fluid supply device according to (4), wherein the inclined portion of the rotating cam is disposed on the upstream side with respect to the recessed portion, An upstream inclined portion that is movable in the pressing direction, and a downstream inclined portion that is arranged downstream of the concave portion and that allows each of the pressing pins to move in the opening direction, The inclined surface shapes of the upstream inclined portion and the downstream inclined portion are preferably set so that the reduced capacity is substantially equal to the increased capacity.

According to the present invention, it is possible to easily make the decreased capacity substantially equal to the increased capacity only by appropriately setting the inclined surface shapes of the upstream inclined section and the downstream inclined section. For this reason, it is possible to reliably and reliably prevent the fluid supplied to the supply destination from flowing back into the fluid supply apparatus.
The upstream inclined portion and the downstream inclined portion are formed, for example, by forming the upstream inclined portion with one surface having a constant inclination angle, and forming the downstream inclined portions with a plurality of surfaces having different inclination angles. . Or you may form the surface of at least one of an upstream inclination part and a downstream inclination part by the continuous change surface from which an inclination angle changes continuously.

(6) The fluid supply device according to the present invention is the fluid supply device described in (5), wherein the average inclination angle of the downstream-side inclined portion is set smaller than the average inclination angle of the upstream-side inclined portion. It is preferable.

  According to the present invention, since the average inclination angle of the downstream-side inclined portion is set smaller than the average inclination angle of the upstream-side inclined portion, the fluid supplied to the supply destination can easily flow back into the fluid supply device. Can be stably prevented.

(7) The fluid supply device according to the present invention is the fluid supply device according to any one of (5) to (6), in which the upstream predetermined pressing pin presses the tube so that the hollow passage is formed. The starting point is when the downstream pressing pin starts to move in the opening direction by the downstream inclined portion, opens the tube, and opens the hollow passage, and the upstream predetermined pressing pin passes through the hollow passage. When the upstream pressing pin newly presses the tube by the upstream inclined portion in the closed state, the downstream pressing pin newly opens the tube by the downstream inclined portion. When the end point is set, the reduced capacity of the hollow passage due to the upstream side pressing pin newly pressing the tube between the start point and the end point indicates that the downstream side pressing pin renews the hollow passage. As to increase the capacity of the hollow passage due to the opening substantially equal, it is preferable that the inclined surface shape of the upstream inclined portion and the downstream-side inclined portion is formed.

  According to the present invention, the upstream pressing pin presses the tube by the upstream inclined portion, and the downstream pressing pin moves in the opening direction by the downstream inclined portion. The volume can be substantially equal to the increased volume. For this reason, even during the opening, it is possible to reliably and stably prevent the fluid supplied to the supply destination from flowing back into the fluid supply device.

(8) The fluid supply device according to the present invention is the fluid supply device described in (4), wherein the inclined portion of the rotating cam is disposed on the upstream side with respect to the concave portion, and each of the pressing pins is arranged. An upstream inclined portion that is movable in the pressing direction, and a downstream inclined portion that is arranged downstream of the concave portion and that allows each of the pressing pins to move in the opening direction, The upstream inclined portion and the downstream inclined portion are each formed in a predetermined shape, and a planar shape of the head surface of the upstream pressing pin, a cross-sectional shape of the head surface of the upstream pressing pin, and the downstream side At least one of the planar shape of the head surface of the pressing pin, the cross-sectional shape of the head surface of the downstream pressing pin, the arrangement interval of the upstream pressing pin, and the arrangement interval of the downstream pressing pin is the reduced capacity. Is the increase It may preferably be set to be substantially equal to the amount.

According to the present invention, in a situation where the upstream inclined portion and the downstream inclined portion are each formed in a predetermined shape, the planar shape of the head surface of the upstream pressing pin, and the cross-sectional shape of the head surface of the upstream pressing pin , At least one of a planar shape of the head surface of the downstream pressing pin, a cross-sectional shape of the head surface of the downstream pressing pin, an arrangement interval of the upstream pressing pin, and an arrangement interval of the downstream pressing pin. By appropriately setting, the decrease volume can be made substantially equal to the increase capacity. For this reason, it is possible to reliably prevent the fluid supplied to the supply destination from flowing back into the fluid supply apparatus.

(9) The fluid supply device according to the present invention is the fluid supply device according to any one of (1) to (8), with respect to the elapsed time of the fluid supplied downstream in the hollow passage of the tube. The relationship graph of the flow rate is preferably substantially rectangular.

According to the present invention, the flow graph of the flow rate with respect to the elapsed time of the fluid supplied to the downstream side in the hollow passage of the tube has a substantially rectangular shape, so the fluid flowing out from the outlet of the tube becomes a pulsating flow. For this reason, the fluid supply operation | movement which flows in the fluid from the inflow port side of a tube, and flows out the fluid from the outflow port side can be performed reliably. Further, since the pressing pin releases the tube from the pressing during the fluid supply stop period in which the fluid between the pulsating flows is not supplied, the elastic sag of the tube can be prevented or alleviated.

(10) The fluid supply device of the present invention is the fluid supply device according to any one of (1) to (9), wherein a plurality of the tubes are provided, and each fluid is supplied by each tube. Is preferred.
According to the present invention, since the fluid is supplied through a plurality of tubes, the total amount of fluid that can be supplied can be increased as compared with the case where one tube is used. In addition, each fluid flow rate and each fluid supply timing that can be supplied from each tube can be set independently. For this reason, the various fluid supply apparatus which can respond appropriately to various uses is realizable.

(11) The fluid supply device of the present invention is the fluid supply device described in (10), wherein the outlets of the tubes are combined, and the flow rate of each fluid flowing out from each outlet is relative to the elapsed time. Each of the relation graphs has a substantially rectangular shape, and it is preferable that the fluids flowing out from the outlets do not overlap in time.

  According to this invention, the rectangular waveform of the fluid supplied from each tube does not overlap in the location where the outflow port of each tube united. For this reason, it is possible to prevent a sudden load from being applied to the fluid supply destination by temporarily supplying a large amount of fluid as in the case where the rectangular waveforms overlap. The rectangular waveforms of the fluid supply in each tube do not overlap if the rectangular waveforms are formed continuously one after another on the time axis and if there is some time between the rectangular waveform and the next rectangular waveform. There may be a case (a case where each rectangular waveform is formed discontinuously).

In addition, the inflow port of each tube may be comprised united, or may be comprised separately.
When the inlets of the tubes are combined, the same fluid can be supplied in large quantities to the same supply destination without applying a sudden load. For example, the same chemical solution can be supplied to the same part of the experimental animal without applying a sudden load.
When the inlet of each tube is configured separately, there are cases where the same fluid is supplied from each tube and different fluids are supplied from each tube. In the case of supplying the former same fluid from each tube, the same fluid can be continuously supplied in a large amount without applying an abrupt load to the supply destination at the union location of each outlet. In the case of supplying the latter different fluids from the respective tubes, different types of fluids can be mixed at the coalescence location and supplied to the supply destination without applying a sudden load. For example, it is possible to supply a mixed chemical solution in which different chemical solutions are mixed at the combined site to the same site of the experimental animal.

(12) The fluid supply device of the present invention is the fluid supply device according to (11), wherein each of the rectangular shapes related to each fluid flowing out from the outlet of each tube is substantially continuously without interruption. It is preferable that the fluid at the combined portion of the outlet of each tube flows out at a substantially constant flow rate.

  According to the present invention, the respective rectangular shapes of the respective fluids flowing out from the outlets of the respective tubes do not overlap with each other and are formed one after another substantially without interruption. For this reason, a fixed amount of fluid flow rate can be continuously supplied to the supply destination at the merged portion. For this reason, the supply destination can always receive the required fluid stably.

(13) The fluid supply apparatus according to the present invention is the fluid supply apparatus described in (10), wherein the outlets of the tubes are preferably independent from each other.

  According to the present invention, since the outlet of each tube is independent, it is possible to supply fluid to a plurality of supply destinations.

In addition, the inflow port of each tube may be united or configured separately.
When the inlets of the former tubes are combined and configured, the same fluid can be supplied to different supply destinations. For example, the same chemical solution can be supplied almost simultaneously to different parts of the experimental animal.
When the inlet of each latter tube is comprised separately, the fluid supply conditions by each tube can each be varied. This fluid supply condition can be at least one of the type of fluid supplied by each tube, the fluid flow rate, the fluid supply speed, and the fluid supply time. For this reason, it becomes possible to implement | achieve the fluid supply apparatus suitable for various uses. For example, different chemical solutions can be supplied almost simultaneously to different parts of the experimental animal by each tube.

It is a figure explaining the fluid supply apparatus 10 of Embodiment 1 of this invention. It is a top view of the principal part of the fluid supply unit 30 accommodated in the fluid supply apparatus 10 of FIG. It is a perspective view of the principal part of the fluid supply unit 30 of FIG. FIG. 3 is a cross-sectional view of the fluid supply unit 30 cut along line A1-A1 in FIG. 2 and viewed from the direction of the arrows. FIG. 3 is a cross-sectional view of the main part of the fluid supply unit 30 taken along line B1-B1 in FIG. It is a figure explaining the cross-sectional shape over the perimeter of the rotating cam 81 in Embodiment 1 of this invention from the relationship of the tube 40 and the press pin 60. FIG. It is a figure explaining the supply state of the fluid Q of Embodiment 1 of this invention. It is a figure explaining the other supply state of the fluid Q of Embodiment 1 of this invention. It is a figure explaining the rotation angle of the boundary a1 of the rotation cam 81 in Embodiment 1 of this invention, and the flow volume of the fluid Q. FIG. It is a figure explaining the backflow prevention operation | movement of the fluid Q of Embodiment 1 of this invention. It is a figure explaining other backflow prevention operation of fluid Q of Embodiment 1 of the present invention. It is a top view of the principal part of the fluid supply unit 130 of Embodiment 2 of this invention. It is a perspective view of the principal part of the fluid supply unit 130 of FIG. It is sectional drawing of the fluid supply unit 130 cut | disconnected by the A2-A2 line | wire of FIG. 12, and seeing from the arrow direction. It is a figure explaining the cross-sectional shape over the perimeter of the rotating cam 81 in Embodiment 2 of this invention from the relationship between the 1st tube 140A, the 2nd tube 140B, and the press pin 60. FIG. It is a figure explaining the supply state of the fluid Q of Embodiment 2 of this invention. It is a figure explaining the other supply state of the fluid Q of Embodiment 2 of this invention. It is a figure explaining the rotation angle of the boundary a1 of the rotation cam 81 in Embodiment 2 of this invention, and the flow volume of the fluid Q. FIG. It is a top view of the principal part of the fluid supply unit 230 of Embodiment 3 of this invention. It is a top view of the principal part of the fluid supply unit 330 of Embodiment 4 of this invention. It is a top view of the principal part of the fluid supply unit 430 of Embodiment 5 of this invention. It is a top view of the micro pump main part of patent documents 1. FIG. 10 is another plan view of the main part of the micropump of Patent Document 1.

  Hereinafter, the present invention will be specifically described based on embodiments.

Embodiment 1
Embodiment 1 of this invention is the fluid supply apparatus 10 used as a chemical | medical solution supply apparatus for implanting under the skin of a laboratory animal.
An experimental animal refers to a small animal that can conduct animal experiments on fluids (medical solutions) such as mice, rats, and guinea pigs. The chemical liquid refers to, for example, medicinal liquids and nutrient liquids, and refers to all liquids for performing animal experiments and animal treatments for their development.

[Structure of fluid supply apparatus 10]
The structure of the fluid supply apparatus 10 of Embodiment 1 is demonstrated.
1A and 1B are diagrams illustrating the fluid supply apparatus 10, FIG. 1A is a plan view thereof, FIG. 1B is a front view thereof, and FIG. 2 is a fluid supply unit 30 accommodated in the fluid supply apparatus 10 of FIG. 3 is a perspective view of the main part of the fluid supply unit 30 of FIG. 2, FIG. 4 is a cross-sectional view of the fluid supply unit 30 cut along the line A1-A1 of FIG. 5 is a cross-sectional view of the main part of the fluid supply unit 30 taken along the line B1-B1 in FIG. 2 and viewed from the direction of the arrow. FIG. 6 shows the cross-sectional shape of the rotary cam 81 over the entire circumference. It is a figure demonstrated from the relationship.

The fluid supply device 10 according to the first embodiment includes a tube 40 made of an elastic body having a hollow passage 43 through which a fluid Q can flow, a pressing direction P that presses the tube 40, and an opening direction R that is opposite to the pressing direction P. A plurality of pressing pins 60 that can be moved to each other, and a pressing pin moving device 80 that allows the pressing pins 60 to move in the pressing direction P and the opening direction R. Each of the pressing pins 60 is sequentially pressed by the pressing pin moving device 80. The fluid supply device 10 is configured to be able to supply the fluid Q in the hollow passage 43 toward the downstream side of the tube 40 by moving in the direction P and the opening direction R to open and close the hollow passage 43 from the closed state. The upstream predetermined pressing pin 61 arranged at a predetermined upstream position of the pressing pin 60 presses the tube 40 and closes the hollow passage 43, and is downstream of the upstream predetermined pressing pin 61. The reduced capacity V of the hollow passage 43 due to the new pressing of the tube 40 by the upstream pressing pins 62 to 64 disposed on the downstream side is separated from the upstream pressing pins 62 to 64 on the downstream side. The pins 76 to 74 are substantially equal to the increased capacity W of the hollow passage 43 by newly opening the tube 40 from the pressed state.

In addition, the said obstruction means the state by which the tube 40 is crushed and the fluid Q cannot substantially flow through the hollow passage 43 of the tube 40, and the open state means that the crushing of the tube 40 is released and the tube 40 is hollow. The state where the fluid Q can flow through the passage 43 is meant, and the completion of the opening means that the crushing is released and the tube 40 returns to a natural state. In addition, if the tube 40 is repeatedly pressed and released by the pressing pin 60 many times, the tube 40 may be bent, or a “sagging phenomenon” that cannot be completely restored to the initial state may occur. In that case, the new reduced capacity V of the hollow passage on the way that the upstream-side pressing pins 62 to 64 sequentially press the tube 40 after the sag is sequentially updated, and the downstream-side pressing pins 76 to 74 are If it is substantially equal to the increased capacity W of the hollow passage 43 by completing the opening of the hollow passage 43 of the tube 40 after sag, the backflow of the fluid can be prevented, which is included in this embodiment.

  As shown in FIG. 1A, the fluid supply device 10 has a substantially box-shaped outer shape, and the exposed surface is covered with an outer case 20. The fluid supply unit 30 shown in FIG. 2 is incorporated in the exterior case 20, and an outlet connection tube 48 connected to the outlet 42 of the tube 40 projects from the side wall. The outlet connection tube 48 is inserted or disposed at a predetermined location of the experimental animal.

The fluid supply unit 30 includes a tube 40 that allows the fluid Q to flow, a tube guide frame 50 that guides and holds the tube 40, a plurality of pressing pins 60 that allow the tube 40 to be closed and released from the closing, and a pressing pin. Functions as a pressing pin moving device 80 capable of moving 60 in the pressing direction P and the opening direction R, a pressing pin guide 90 for guiding the pressing pin 60 to be movable in the pressing direction P and the opening direction R, and a base member (base). The base 95 which has is provided.

  The tube 40 has a hollow passage 43 that allows fluid to flow in the center, is rich in elasticity, has high strength and appropriate hardness, and has chemical resistance and gas barrier properties (a property that does not allow gas to pass through). It is preferably made of an excellent material. The material is most preferably a synthetic resin material, and an olefin-based, vinyl chloride-based, or silicon-based synthetic resin is preferable.

As shown in FIG. 2, the tube 40 is formed in a bent planar shape, and the upper end is an inlet 41 for the fluid Q and the lower end is an outlet 42 for the fluid Q. The inlet 41 is connected to the inlet connection tube 47, and the outlet 42 is connected to the outlet connection tube 48. The outlet connection tube 48 protrudes from the outer case 20 as shown in FIG. The inlet connection tube 47 is connected to a reservoir (not shown) in which a fluid (chemical solution) is stored and supplied with the fluid, and the outlet connection tube 48 is inserted into the body of the animal to supply the fluid. The reservoir is housed in the outer case 20, and new fluid is replenished from the outside by a syringe-like replenisher.
A portion of the tube 40 that is held and guided by the tube guide frame 50 is an arc-shaped portion 46 that is formed in an arc shape. The arc-shaped portion 46 is a portion that is pressed by a plurality of pressing pins 60 and released from the pressing.

  The tube guide frame 50 has a substantially circular planar shape and is disposed on the upper side of the tube 40. A tube guide groove for guiding the arc-shaped portion 46 to a position corresponding to the arc-shaped portion 46 of the tube 40 on the lower surface thereof. 51 is formed. As shown in FIG. 4, the tube guide groove 51 is a rectangle whose cross-sectional shape is opened downward, and the groove depth is deeper than the tube diameter in a state where the arc-shaped portion 46 of the tube 40 is opened. The arcuate portion 46 is formed slightly wider than the lateral width that is pressed by the pressing pin 60 and spreads in the lateral direction.

  As shown in FIGS. 2, 3, 5, and 6, a total of 16 pressing pins 60 are arranged in an arc shape below the tube 40. The pressing pin 60 is inserted into a pressing pin guide hole 91 of a pressing pin guide 90 to be described later, and is disposed along the center line of the arcuate portion 46 of the tube 40, and in the pressing direction P and the opening direction R. Guided to move. In that case, the arrangement | positioning space | interval T of the press pin 60 and the adjacent press pin 60 is arrange | positioned so that it may be the same also in all the press pins 60. FIG. Moreover, each pressing pin 60 is the same shape, the same size, and the same material, and has the head part 60a and the pin part 60b which can press the tube 40 like illustration of FIG. The outer shape of the head 60a is circular, and the cross-sectional shape of the pin portion 60b is circular. The surface of the head 60a is a smooth flat surface, the vicinity of the lower end of the pin portion 60b is formed in an elongated shape, and the lower end is formed in a hemispherical shape. The pressing pin 60 is preferably a metal having high hardness, a small friction coefficient, and excellent slidability.

The names of the 16 pressing pins 60 are as follows.
Among the 16 pressing pins 60, the upstream first pressing pin 61 (upstream predetermined pressing pin), upstream from the inlet 41 side (upstream side) of the tube 40 in order from the outlet 42 side (downstream side). Side second pressing pin 62, upstream side third pressing pin 63, upstream side fourth pressing pin 64, upstream side fifth pressing pin 65, upstream side sixth pressing pin 66, upstream side seventh pressing pin 67, upstream side This is referred to as an 8-pressing pin 68. The upstream first pressing pin 61 is disposed at the most upstream position of the 16 pressing pins 60, and is an upstream predetermined pressing pin in the first embodiment. The upstream pressing pin is a pressing pin arranged relatively upstream of the 16 pressing pins 60, and includes an upstream third pressing pin that continues downstream including the upstream second pressing pin 62. 63 and the upstream side fourth pressing pin 64 correspond to pressing pins that sequentially press the tube 40 from the start point to the end point as described later.

Of the 16 pressing pins 60, the downstream first pressing pin 76 (downstream predetermined pressing pin), the downstream second pressing pin 75, and the downstream third pressing pin in order from the downstream side to the upstream side. 74, the downstream fourth pressing pin 73, the downstream fifth pressing pin 72, the downstream sixth pressing pin 71, the downstream seventh pressing pin 70, and the downstream eighth pressing pin 69. The downstream first pressing pin 76 is disposed at the most downstream position of the 16 pressing pins 60, and is a downstream predetermined pressing pin in the first embodiment. Further, the downstream-side pressing pin is a pressing pin that is disposed on the relatively downstream side of the 16 pressing pins 60, and includes the downstream-side first pressing pin 76, and the downstream-side second following the upstream side thereof. The pressing pin 75 and the downstream third pressing pin 74 correspond to the pressing pin that sequentially opens the hollow passage 43 by releasing the pressing of the tube 40 from the start point to the end point as described later. .
The upstream side means the side close to the upstream when the fluid Q flows in the tube 40, and the tube 40 indicates the side close to the inlet 41. The downstream side means the side close to the downstream when the fluid Q flows in the tube 40, and the side close to the outflow port 42 in the tube 40 is indicated.

  The pressing pin moving device 80 includes a rotating cam 81 that enables the pressing pin 60 to move in both the pressing direction P and the opening direction R, and a rotation driving device 85 that rotationally drives the rotating cam 81 in a predetermined rotation direction K. .

  The rotating cam 81 has a disk shape, and has a convex portion 82 that can move the pressing pin 60 in the pressing direction P, a concave portion 83 that can move the pressing pin 60 in the opening direction R, and a convex portion on the outer peripheral surface. An inclined portion 84 that connects 82 and the recess 83 is formed. Details of the rotating cam 81 will be described later.

The rotation driving device 85 includes a motor 86 for rotating the rotating cam 81 in a predetermined rotation direction K, a rotation driving circuit 88 for supplying driving power to the motor 86 and driving the motor 86 in a predetermined direction K, and rotation driving. A power source (not shown) such as a battery for supplying power to the circuit 88 is provided. A motor rotating shaft 87 of the motor 86 is coupled to the center portion of the rotating cam 81.
The pressing pin 60 can be moved in both directions by the pressing pin moving device 80, but is guided by the pressing pin guide 90.

  The pressing pin guide 90 is disposed above the rotating cam 81 and below the tube guide frame 50. The pressing pin guide 90 has a substantially circular planar shape, and includes a pressing pin guide hole 91 at a position corresponding to the planar position of each pressing pin 60. The pressing pin guide hole 91 guides the pressing pin 60 to be movable in the pressing direction P and the opening direction R while arranging all the pressing pins 60 as described above.

  The base 95 has a substantially circular planar shape, holds the outer peripheral surfaces of the tube guide frame 50 and the pressing pin guide 90 at predetermined positions, supports the rotating cam 81 in a rotatable manner, a motor 86 and a rotational drive. Circuit 88 is held in place.

  Here, the convex part 82, the concave part 83, and the inclined part 84 formed on the surface of the rotating cam 81 will be described in detail.

  As shown in FIGS. 2 and 6, pairs of convex portions 82, concave portions 83, and inclined portions 84 are arranged on the outer peripheral side surface of the rotating cam 81 at three equal intervals. Accordingly, the three pairs are formed on the outer peripheral surface of the rotating cam 81 every 120 degrees around the rotation center O of the rotating cam 81. When the lower end of the pressing pin 60 is lifted, the convex portion 82 is capable of closing the hollow passage 43 (that is, closing the tube 40) by the surface of the head 60a of the pressing pin 60 pushing up the lower surface of the tube 40. Is configured. When the lower end of the pressing pin 60 falls to the surface of the recessed portion 83, the recessed portion 83 receives the elastic opening force of the tube 40 and the tube 40 can return to its original circular shape when the lower end of the pressing pin 60 falls to the surface of the recessed portion 83 ( In other words, the hollow passage 43 is open to a depth that can be closed. Therefore, a step h (see FIG. 6) is formed between the convex portion 82 and the concave portion 83.

As shown in FIG. 6, the inclined portion 84 is configured to connect gently between the convex portion 82 and the concave portion 83. Therefore, the pressing pin 60 can smoothly move from the convex portion 82 to the concave portion 83 or from the concave portion 83 to the convex portion 82.
The inclined portion 84 is provided on the side opposite to the rotational direction K of the rotary cam 81 with respect to a certain recess 83, and the upstream side pushes up the pressing pin 60 in the pressing direction P when the rotary cam 81 rotates in the rotational direction K. An inclined portion 84a and a downstream inclined portion 84b that is provided on the rotational direction K side of the rotary cam 81 with respect to the concave portion 83 and that drops the pressing pin 60 in the opening direction R when the rotary cam 81 rotates in the rotational direction K. Have The average inclination angle β of the downstream side inclined portion 84b with respect to the surface of the convex portion 82 is formed smaller than the average inclination angle α of the upstream side inclined portion 84a with respect to the surface of the convex portion 82.

A planar configuration of the rotating cam 81 will be described with reference to FIGS. 2 and 6.
First, each part of the rotating cam 81 is named as follows. As shown in FIG. 6, in the first pair including a certain convex portion 82, a concave portion 83 adjacent to the convex portion 82, and an inclined portion 84 adjacent to the concave portion 83, the upstream side inclined portion 84 a and the concave portion 83. And the boundary between the concave portion 83 and the downstream inclined portion 84b is referred to as b1, and in the second pair on the rotation direction K side (downstream side) with respect to the first pair, the upstream inclined portion 84a The boundary between the concave portion 83 is referred to as a2, the boundary between the concave portion 83 and the downstream inclined portion 84b is referred to as b2, and in the third pair on the rotational direction K side (downstream side) with respect to the second pair, the upstream inclined portion. The boundary between 84a and the recessed portion 83 is referred to as a3, and the boundary between the recessed portion 83 and the downstream inclined portion 84b is referred to as b3. On the other hand, in FIG. 2, from the rotation center O of the rotating cam 81, the left horizontal direction (−X direction in FIG. 2) is 0 degrees, the front side direction (−Y direction in FIG. 2) is 90 degrees, and the right horizontal direction (FIG. 2 + X direction) is 180 degrees, and the far side direction (+ Y direction in FIG. 2) is 270 degrees.

In the rotating cam 81 shown in FIG. 2, the first pair of boundaries a1 is located at 0 degrees. Therefore, in the rotating cam 81, the first pair of the boundary a1, the boundary b1, the second pair of the boundary a2, the boundary b2, and the third pair of boundaries in order along the rotational direction K (counterclockwise direction). a3 and boundary b3 are arranged. At that time, the boundary b1 coincides with the arrangement position of the upstream second pressing pin 62, and the boundary a2 coincides with the arrangement position of the downstream second pressing pin 75.
In FIG. 4, since the downstream eighth pressing pin 69 rides on the convex portion 82 of the rotating cam 81, the arc-shaped portion 46 of the tube 40 is pressed to close the hollow passage 143 b.

[Fluid supply operation and supply stop operation]
Next, the fluid supply operation and supply stop operation of the fluid supply apparatus 10 will be described with reference to FIGS. 7 and 8.

FIG. 7 is a view for explaining the supply state of the fluid Q, and is a view for explaining the pressing and releasing operations of the pressing pin 60 with respect to the tube 40 and the supply state of the fluid Q as the rotating cam 81 rotates. More specifically, FIG. 7 shows the fluid generated by the rotating cam 81, the pressing pin 60, and the tube 40 when the rotating cam 81 rotates in the rotation direction K from the state of FIG. 2 (the state where the boundary a1 is positioned at 0 degree). It is a figure explaining the supply stop and supply state of Q. 7A shows a state in which the boundary a1 is rotated by 50 degrees, FIG. 7B shows a state in which the boundary a1 has been rotated by 55 degrees, FIG. 7C shows a state in which the boundary a1 has been rotated by 60 degrees, and FIG. (D) is a state in which the boundary a1 is rotated by 65 degrees, FIG. 7 (e) is a state in which the boundary a1 is rotated by 70 degrees, and (f) in FIG. 7 is a state in which the boundary a1 is rotated by 75 degrees. It is a figure explaining the supply state.

In FIG. 7A (a state where the boundary a1 is rotated by 50 degrees), the rotating cam 81 extends from the upstream first pressing pin 61 to the downstream fifth pressing pin 72 closest to the inlet 41 among the pressing pins 60. And the tube 40 is opened. The downstream fourth pressing pin 73 to the downstream third pressing pin 74 push up the tube 40 along the inclined surface of the downstream inclined portion 84b. The downstream-side second pressing pin 75 and the downstream-side first pressing pin 76 ride on the convex portion 82, press the tube 40 most and close the hollow passage 43 of the tube 40. The fluid Q flows into the hollow passage 43 from the upstream side to the closed portion.
In this state, even if the rotating cam 81 rotates slightly (less than 5 degrees) in the rotation direction K, the downstream first pressing pin 76 continues to block the hollow passage 43 of the tube 40, so that the fluid Q is supplied to the downstream side. Not (that is, in a supply stop state).

  In FIG. 7B (in the state where the boundary a1 is rotated 55 degrees), the upstream first pressing pin 61 rides on the convex portion 82 of the rotating cam 81, presses the tube 40 most and closes the hollow passage 43 of the tube 40. To do. A location where the hollow passage 43 is closed by the upstream first pressing pin 61 is referred to as an upstream first pressing pin closing location 61p. At this time, the downstream first pressing pin 76 still rides on the convex portion 82 and keeps the hollow passage 43 of the tube 40 closed. A portion where the hollow passage 43 is blocked by the downstream first pressing pin 76 is referred to as a downstream first pressing pin blocking portion 76p. Therefore, in the hollow passage 43 of the tube 40, the hollow passage 43 between the upstream first pressing pin closing portion 61 p and the downstream first pressing pin closing portion 76 p is a sealed space 49. As described above, the fluid Q is not supplied downstream and is in a supply stopped state.

  The time when the rotating cam 81 starts to rotate from the state of FIG. The starting point is that the upstream first pressing pin 61 presses the tube 40 and closes the hollow passage 43, and the downstream first pressing pin 76 presses and closes the hollow passage 43 (in FIG. 7B). After the state), it refers to the time when the upstream second pressing pin 62 arranged immediately downstream of the upstream first pressing pin 61 starts to press the tube 40.

In FIG. 7C (the state where the boundary a1 is rotated by 60 degrees), the upstream second pressing pin 62 newly rides on the convex portion 82 and newly closes the hollow passage 43 of the tube 40. The upstream first pressing pin 61 remains on the convex portion 82 of the rotating cam 81. On the other hand, the downstream first pressing pin 76, the downstream second pressing pin 75, and the downstream third pressing pin 74 are all slightly lowered along the downstream inclined portion 84b. The downstream first pressing pin 76, the downstream second pressing pin 75, and the downstream third pressing pin 74 unblock the hollow passage 43 and slightly open it.
Here, in the hollow passage 43 on the downstream side from the upstream first pressing pin closing portion 61p in FIG. 7B, the number of hollow passages is reduced by the upstream second pressing pin 62 newly closing the hollow passage 43. The capacity is substantially equal to the increased capacity of the hollow passage when the downstream first pressing pin 76, the downstream second pressing pin 75, and the downstream third pressing pin 74 slightly open the hollow passage 43. The inclined state of the downstream inclined portion 84b with respect to the upstream inclined portion 84a is set. For this reason, in the hollow passage 43 on the downstream side from the upstream first pressing pin closing portion 61p in FIG. 7B, the positive pressure associated with the reduced capacity of the hollow passage 43 and the negative pressure associated with the increased capacity of the hollow passage are For this reason, the fluid Q is not supplied downstream and is in a supply stop state.

  In FIG. 7D (the state in which the boundary a1 is rotated by 65 degrees), the upstream third pressing pin 63 newly rides on the convex portion 82 and further closes the hollow passage 43. The upstream first pressing pin 61 remains on the convex portion 82 of the rotating cam 81. On the other hand, both the downstream first pressing pin 76 and the downstream second pressing pin 75 are further lowered along the downstream inclined portion 84b to further open the hollow passage 43. Also in this case, in the hollow passage 43 on the downstream side from the upstream first pressing pin closing portion 61p, the upstream third pressing pin 63 newly closes the hollow passage 43 with respect to the tube of FIG. The decrease capacity of the hollow passage due to the upstream side is substantially equal to the increase capacity of the hollow passage due to the downstream first pressing pin 76 and the downstream second pressing pin 75 further opening the hollow passage 43. The inclined state of the downstream inclined portion 84b with respect to the side inclined portion 84a is set. For this reason, the fluid Q is not supplied downstream and is in a supply stopped state.

  In (e) of FIG. 7 (a state where the boundary a1 is rotated by 70 degrees), the upstream fourth pressing pin 64 newly rides on the convex portion 82 and further closes the hollow passage 43. The upstream first pressing pin 61 remains on the convex portion 82 of the rotating cam 81. On the other hand, since the downstream first pressing pin 76 descends into the recess 83, the hollow passage 43 is completely opened. Also in this case, in the hollow passage 43 on the downstream side from the upstream first pressing pin closing portion 61p, the upstream fourth pressing pin 64 newly closes the hollow passage 43 with respect to the tube of FIG. The decrease capacity of the hollow passage by the downstream side of the upstream inclined portion 84a is substantially equal to the increase capacity of the hollow passage by the downstream first pressing pin 76 further opening the block of the hollow passage 43. The inclined state of the inclined portion 84b is set. For this reason, the fluid Q is not supplied downstream and is in a supply stopped state.

  The time when the state shown in FIG. 7E is reached is called an end point. This end point is a state in which the upstream first pressing pin 61 continues to block the hollow passage 43 and the upstream pressing pins 62 to 64 sequentially press the tube 40 while the tube 40 is being pressed. This indicates the time when all of the pressing pins 76 to 74 that have been pressed complete the opening of the hollow passage 43.

  In (f) of FIG. 7 (a state in which the boundary a1 is rotated by 75 degrees), the upstream fifth pressing pin 65 newly rides on the convex portion 82 and newly closes the hollow passage 43. The upstream first pressing pin 61 remains on the convex portion 82 of the rotating cam 81. On the other hand, the state where the hollow passage 43 is completely opened is maintained while the downstream first pressing pin 76 is lowered to the recess 83. Accordingly, the upstream fifth pressing pin 65 is connected to the tube 40 in the downstream hollow passage 43 from the upstream fourth pressing pin blocking portion 64p, which is blocking the hollow passage 43 by the upstream fourth pressing pin 64 in FIG. The capacity is reduced by pressing. The fluid Q is pushed out by the decrease in the capacity, and the fluid Q is supplied. The timing at which the fluid starts to be supplied downstream is when the boundary a1 of the rotating cam 81 starts to rotate in the rotation direction K from 70 degrees. Hereinafter, as the rotating cam 81 rotates in the rotation direction K, the fluid continues to be supplied to the downstream side. This supply of fluid continues until the downstream first pressing pin 76 rides on the convex portion 82 of the rotating cam (when the boundary a1 rotates 130 degrees).

  Next, a state where supply of fluid to the downstream side is stopped (supply stop state) will be described.

FIG. 8 is a view for explaining another supply state of the fluid Q, and is a view for explaining a pressing operation and an opening operation of the pressing pin 60 with respect to the tube 40 and a supply state of the fluid Q as the rotating cam 81 further rotates. . More specifically, FIG. 8 shows that the rotating cam 81, the pressing pin 60, and the tube 40 when the rotating cam 81 further rotates in the rotation direction K from the state of FIG. 7 and the boundary a1 rotates from 125 degrees to 135 degrees. It is a figure explaining the supply of the fluid Q by, and a supply stop state. 8A shows a state in which the boundary a1 is rotated by 125 degrees, FIG. 8B shows a state in which the boundary a1 has been rotated by 130 degrees, and FIG. 8C shows a state in which the boundary a1 has been rotated by 135 degrees. It is a figure explaining the supply stop state of fluid Q. FIG.

  In FIG. 8A (in a state where the boundary a1 is rotated 125 degrees), the upstream side sixth pressing pin 66 to the downstream side second pressing pin 75 ride on the convex portion 82, and the upstream side sixth pressing pin. The hollow passage 43 of the tube 40 from 66 to the downstream second pressing pin 75 is closed. The downstream first pressing pin 76 falls into the recess 83 of the rotating cam 81, and the hollow passage 43 is in an open state. For this reason, although not shown in the figure, the capacity of the hollow passage is newly reduced by the downstream second pressing pin 75 pushing up the tube with respect to the state where the boundary a1 is at a position of 120 degrees. Q is supplied downstream.

Similarly, in FIG. 8B (in a state where the boundary a1 is rotated by 130 degrees), the downstream first pressing pin 76 rides on the convex portion 82 and closes the hollow passage 43 of the tube 40. A reduced capacity of the hollow passage is generated, so that the fluid Q is supplied downstream.

  In FIG. 8C (in a state where the boundary a1 is rotated 135 degrees), the downstream first pressing pin 76 does not change while riding on the convex portion 82, so that the tube 40 is not newly pushed up. Therefore, the hollow passage 43 does not generate a new reduced capacity of the hollow passage. For this reason, the fluid Q is not supplied downstream, and the supply is stopped. This supply stop state starts when the boundary a1 of the rotary cam rotates by 130 degrees.

As is clear from the above, the period during which the fluid Q is supplied to the downstream side is a period in which the boundary a1 of the rotating cam 81 is rotated by 70 degrees to 130 degrees.
In addition, as described above, the rotating cam 81 has a pair of the convex portion 82, the concave portion 83, and the inclined portion 84 arranged on the outer peripheral side surface of the rotating cam 81 at three equal intervals. In other words, the three pairs are arranged every 120 degrees around the rotation center O of the rotary cam 81. For this reason, the supply and stop of supply of the fluid Q as shown in FIGS. 7 and 8 are repeated three times while the rotation cam 81 rotates 360 degrees around the rotation center O of the fluid Q.

FIG. 9 is a diagram illustrating the rotation angle of the boundary a1 of the rotary cam 81 and the flow rate of the fluid Q. The horizontal axis of FIG. 9 represents the rotation angle of the boundary a1 accompanying the rotation of the rotating cam 81 with reference to the state where the boundary a1 of the rotating cam 81 is located at 0 degrees (the state of FIG. 2). The vertical axis in FIG. 9 represents the flow rate of the fluid Q.
As is clear from FIG. 9, during the fluid supply period t in which the fluid Q is supplied to the downstream side, the boundary a1 of the rotating cam 81 rotates by 70 degrees to 130 degrees, 190 to 250 degrees, and 310 to 370 degrees (10 degrees). It becomes the period. The fluid supply stop period s during which the fluid Q is not supplied downstream is a period in which the boundary a1 of the rotating cam 81 is rotated by 130 to 190 degrees, 250 to 310 degrees, and 10 to 70 degrees.

In this case, since the rotation speed of the rotary cam 81 is constant, the above-mentioned angle number at the boundary a1 corresponds to the elapsed time. For example, in the rotating cam, the elapsed time for the boundary a1 to rotate from 50 degrees to 100 degrees is 50% of the elapsed time for the boundary a1 to rotate from 50 degrees to 150 degrees. Note that the flow rate q in each of the fluid supply periods t is substantially constant.
The relationship graph with respect to the elapsed time of the fluid Q supplied to the downstream side (outlet 42 side) of the hollow passage 43 of the tube 40 forms a rectangular shape as shown in FIG.

[Preventing fluid backflow]
A backflow prevention operation in which the fluid Q does not flow back to the fluid supply device 10 when switching from the state where the fluid Q is not supplied to the downstream side (supply stop state) to the supply state will be described. A description will be given by taking as an example the rotation angle of the boundary a1 of the rotary cam 81 from 55 degrees (state shown in FIG. 7B) to 70 degrees (state shown in FIG. 7E).

  FIG. 10 is a diagram illustrating the backflow prevention operation of the fluid Q, and the operation of each pressing pin, the tube 40, and the fluid Q when the rotation angle of the boundary a1 in the rotary cam 81 is changed from 55 degrees to 70 degrees. FIG. In FIG. 10, the solid line display of the tube 40 and the pressing pin represents the case where the rotation angle of the boundary a1 is 55 degrees (when the start point is in the state of FIG. 7B), and the chain line display is the rotation angle of the boundary a1 of 70 degrees. (When the end point is reached in the state of FIG. 7E).

  In the state indicated by the solid line in FIG. 10 (the state where the rotation angle of the boundary a1 is 55 degrees), the upstream first pressing pin 61 is formed on the upstream convex portion 82 of the rotating cam 81 as described in FIG. It rides up and closes the hollow passage 43, and the downstream first pressing pin 76 rides on the convex portion 82 on the downstream side and closes the hollow passage 43. In this state, the hollow passage 43 between the upstream first pressing pin blocking part 61p closed by the upstream first pressing pin 61 and the downstream first pressing pin blocking part 76p closed by the downstream first pressing pin 76. Becomes a sealed space 49. For this reason, the fluid Q staying in the sealed space 49 is not supplied downstream.

  On the other hand, in the state indicated by the chain line (the rotation angle of the boundary a1 is 70 degrees), the upstream fourth pressing pin 64 (the upstream second pressing pin 62 and the upstream side Riding on the upstream convex portion 82 (with the three pressing pins 63) and closing the hollow passage 43, the downstream first pressing pin 76 (with the downstream second pressing pin 75 and the downstream third pressing pin 74) is the recess 83. The hollow passage 43 is completely opened. Also in this case, the fluid Q is not supplied to the downstream side as described in the operation in FIG.

  Here, when the state shown by the solid line in FIG. 10 (start point) changes to the chain line state (end point), on the upstream side, the upstream side second pressing pin 62, the upstream side third pressing pin 63, and the upstream side fourth side. When the pressing pin 64 moves in the pressing direction P, the tube 40 is pushed up, and the capacity (volume) of the hollow passage 43 on the downstream side from the upstream first pressing pin closing portion 61p is reduced. The reduced capacity of the hollow passage 43 is referred to as a reduced capacity V. The hollow passage 43 has a positive pressure according to the reduced capacity V.

  Similarly, on the downstream side, the downstream first pressing pin 76, the downstream second pressing pin 75, and the downstream third pressing pin 74 move in the opening direction R, so that the tube 40 is pushed down by its elasticity, and the tube 40 opens completely and returns to its original shape. At this time, the capacity (volume) of the hollow passage 43 on the downstream side of the upstream first pressing pin closing portion 61p increases. The increased capacity of the hollow passage 43 is referred to as an increased capacity W. The hollow passage 43 has a negative pressure according to the increased capacity W.

  In this case, the inclined surface shapes (inclination angle states) of the upstream inclined portion 84a and the downstream inclined portion 84b are set so that the reduced capacity V is substantially equal to the increased capacity W. Therefore, even if the state shown by the solid line in FIG. 10 is changed to the chain line state, the capacity of the hollow passage 43 on the downstream side of the upstream first pressing pin closing portion 61p is not changed. For this reason, the positive pressure and the negative pressure are equal, and the fluid Q does not flow backward from the fluid supply destination.

  Further, the reduced capacity increases everywhere between the solid line display state in FIG. 10 (the rotation angle of the boundary a1 is 55 degrees) and the chain line display state (the rotation angle of the boundary a1 is 70 degrees). Substantially equal to capacity. For example, the decrease capacity and the increase capacity are also shown in the middle of FIGS. 7 (b) and 7 (c), 7 (c), 7 (d), 7 (d), and 7 (e). Are set to be substantially equal, the inclined surface shapes (inclination angle states) of the upstream inclined portion 84a and the downstream inclined portion 84b are set. The backflow prevention operation at this midpoint will be described in detail with reference to FIG.

  FIG. 11 is a diagram illustrating another backflow prevention operation of the fluid Q, and the operation of each pressing pin, the tube 40, and the fluid Q when the rotation angle of the boundary a1 in the rotary cam 81 is 57.5 degrees. FIG.

On the upstream side of FIG. 11, in the solid line display (the rotation angle of the boundary a1 is 57.5 degrees), the upstream second pressing pin 62 contacts the intermediate portion of the upstream inclined portion 84a and moves slightly in the pressing direction P. The tube 40 is slightly pressed. The tube chain line display is the tube position in the solid line display of FIG. 10 (the rotation angle of the boundary a1 is 55 degrees). For this reason, the solid line tube (the rotation angle of the boundary a1 is 57.5 degrees) in FIG. 11 is slightly pressed against the position of the tube line (the rotation angle of the boundary a1 is 55 degrees) in FIG. . For this reason, the capacity | capacitance of the hollow channel | path 43 reduces the capacity | capacitance equivalent to a diagonal line display part. This reduced capacity is assumed to be V1.

On the other hand, on the downstream side of FIG. 11, in the solid line display (the rotation angle of the boundary a1 is 57.5 degrees), the downstream first pressing pin 76, the downstream second pressing pin 75, and the downstream third pressing pin 74 are downstream. It contacts the middle part of the side inclined portion 84b and is slightly lowered in the opening direction R. For this reason, the tube 40 is slightly opened as shown by a solid line. The chain line display of the tube is the tube indicated by the solid line in FIG. For this reason, the solid line display tube (the rotation angle of the boundary a1 is 57.5 degrees) in FIG. 11 is slightly opened with respect to the position of the chain line display tube (the rotation angle of the boundary a1 is 55 degrees) in FIG. For this reason, the capacity | capacitance of the hollow channel | path 43 increases the capacity | capacitance corresponded to an oblique line display part. This increased capacity is assumed to be W1.
In the case of FIG. 11, the inclined surface shapes (inclination angle states) of the upstream inclined portion 84a and the downstream inclined portion 84b are set so that the decreased capacity V1 is substantially equal to the increased capacity W1.

In order to make the decrease capacities V and V1 substantially equal to the increase capacities W and W1, the tilt angles of the upstream tilt portion 84a and the downstream tilt portion 84b are appropriately set. Specifically, the average slope angle of the downstream slope portion 84b is set smaller than the average slope angle of the upstream slope portion 84a, and the downstream slope portion 84b is formed of a plurality of surfaces having different slope angles. Form. Alternatively, the upstream inclined portion 84a is formed by one surface having a certain inclination angle, and the surface of the downstream inclined portion 84b is formed by a plurality of curved surfaces having different curvature radii. Alternatively, at least one of the upstream side inclined portion 84a and the downstream side inclined portion 84b may be formed by a continuously changing surface whose inclination angle continuously changes.

The fact that the decreased capacities V and V1 are substantially equal to the increased capacities W and W1 only means that the decreased capacities V and V1 and the increased capacities W and W1 are exactly the same. Rather, it includes that one has a slight difference with respect to the other. The slight difference indicates that one of the reduced capacities V and V1 and the increased capacities W and W1 is within 15 percent, preferably within 10 percent, more preferably within 5 percent relative to the other.
When the decrease capacities V and V1 exceed 15% with respect to the increase capacities W and W1, there is a possibility that the pressure of the fluid Q supplied to the downstream side becomes too large and places a burden on the supply destination too much. When the increased capacities W and W1 exceed 15% with respect to the decreased capacities V and V1, the backflow is substantially generated, and it is difficult to solve the above-described problem. For this reason, one of the reduced capacities V, V1 and the increased capacities W, W1 is required to be within 15 percent, preferably within 10 percent, more preferably within 5 percent relative to the other.

[Effect of Embodiment 1]
The effects of the first embodiment are as follows.

(A) Since the fluid Q supplied to the supply destination does not flow back into the fluid supply apparatus 10, the accurate flow rate r of the fluid Q can be reliably supplied to the supply destination (for example, the body of a laboratory animal or the like). Become. In addition, it is possible to prevent the fluid Q once supplied to the supply destination from flowing backward in a state where it is mixed with other fluids of the supply destination (for example, body fluids of experimental animals). For this reason, it is possible to prevent the fluid Q accumulated in the tube 40 and supplied in the future as in the case of backflow from being contaminated and altered, and changing the concentration of the fluid. Therefore, the fluid supply apparatus 10 of Embodiment 1 can improve the reliability of fluid supply.

(B) The reduced capacity of the hollow passage 43 between the start point at which the upstream second pressing pin 61 starts pressing the tube 40 and the end point when the opening of the hollow passage 43 by all of the downstream pressing pins 76 to 74 is completed. V is substantially equal to the increased capacity W of the hollow passage 43. For this reason, it is possible to reliably prevent the fluid Q supplied to the supply destination from flowing back into the fluid supply apparatus 10.

(C) Since the rotary cam 81 that is rotationally driven in a predetermined direction by the rotary drive device 85 is provided, each of the pressing pins 60 can be reliably moved in the pressing direction P and the releasing direction R by the rotating cam 81. Further, the rotating cam 81 can be easily and precisely manufactured by injection molding or machining, the movement stroke of each pressing pin 60 can be maintained with high accuracy, and the manufacturing cost can be reduced.

(D) Since the rotating cam 81 includes the convex portion 82, the concave portion 83, and the inclined portion 84, the height of the pressing pins 61 to 76 after moving in the pressing direction P by the convex portion 82 can be maintained. The depth of each pressing pin 61 to 76 after moving in the opening direction R can be maintained by the concave portion 83, and the pressing pin 61 to 76 can smoothly move in the pressing direction P and the opening direction R by the inclined portion 84. It becomes possible.

(E) It is possible to easily make the decreased capacities V and V1 substantially equal to the increased capacities W and W1 only by appropriately setting the inclined surface shapes of the upstream inclined section 84a and the downstream inclined section 84b. Become. For this reason, it is possible to reliably and stably prevent the fluid Q supplied to the supply destination from flowing back into the fluid supply apparatus 10.

(F) Since the average inclination angle β of the downstream inclined portion 84b is set smaller than the average inclination angle α of the upstream inclined portion 84a, the fluid Q supplied to the supply destination flows back into the fluid supply apparatus 10. This can be easily and stably prevented.

(G) The upstream pressing pins 62 to 64 press the tube 40 by the upstream inclined portion 84a, and the downstream pressing pins 76 to 74 move in the opening direction by the downstream inclined portion 84b, thereby opening the tube 40. Even within, the decrease volume V1 can be made substantially equal to the increase volume W1. For this reason, even during the opening, the fluid Q supplied to the supply destination can be reliably and stably prevented from flowing back into the fluid supply apparatus 10.

(H) Since the relationship graph of the flow rate with respect to the elapsed time of the fluid Q supplied downstream in the hollow passage 43 of the tube 40 is substantially rectangular, the fluid Q flowing out from the outlet 42 of the tube 40 is a pulsating flow. Become. For this reason, the fluid supply operation | movement which flows in the fluid Q from the inflow port 41 side of the tube 40, and flows out the fluid Q from the outflow port 42 side can be performed reliably. Further, during the fluid supply stop period s when the fluid Q between the pulsating flows is not supplied, the pressing pins 61 to 76 release the tube 40 from being pressed, so that the elastic sag of the tube 40 can be prevented or alleviated. It becomes.

[Embodiment 2]
In the first embodiment, one tube 40 is used. The fluid supply device 110 of the second embodiment (similar to the fluid supply device 10 of FIG. 1) uses two tubes and supplies each fluid through each tube. The rest is the same as in the first embodiment.

[Structure of fluid supply unit 130]
The structure of the fluid supply unit 130 incorporated in the fluid supply device 110 of the second embodiment (similar to the fluid supply device 10 of FIG. 1) will be described.
12 is a plan view of the main part of the fluid supply unit 130, FIG. 13 is a perspective view of the main part of the fluid supply unit 130 of FIG. 12, and FIG. 14 is a fluid cut along the line A2-A2 of FIG. 15 is a cross-sectional view of the supply unit 130, and FIG. 15 is a view for explaining the cross-sectional shape of the outer peripheral surface of the rotating cam 81 over the entire circumference from the relationship between the first tube 140A, the second tube 140B, and the pressing pin 60.

The fluid supply unit 130 includes a tube guide frame 150, a first tube 140A, and a first tube 140A and a second tube 140B that allow the fluids Q and Q to flow, respectively. A plurality of pressing pins 60 that enable the second tube 140B to be closed and released from pressing, a pressing pin moving device 80 that can move the pressing pins 60 in the pressing direction P and the opening direction R, and the pressing pins 60 in the pressing direction. A pressing pin guide 190 that is movably guided in the P and opening directions R and a base 95 that functions as a foundation member (base) are provided. The same members as those in the first embodiment are denoted by the same reference numerals.

The first tube 140A and the second tube 140B, like the tube 40 of the first embodiment, each have a hollow passage 143 and are made of a material that is rich in elasticity and has high strength and appropriate hardness. .
As shown in FIG. 12, each of the first tube 140A and the second tube 140B is formed in a bent planar shape, each having an upper end at the inlets 141 and 141 for the fluid Q, and each lower end at the outlet 142 for the fluid Q. 142. Each inflow port 141, 141 is connected to the inflow port connection tube 147. For this reason, each inflow port 141 and 141 is united by the inflow port connection tube 147. Each outlet 142, 142 is connected to an outlet connecting tube 148, respectively. For this reason, each outflow port 142,142 is united by the outflow port connection tube 148, and each fluid Q, Q joins. The outflow port connecting tube 148 protrudes from the outer case 20 as shown in FIG. 1 and is inserted or arranged in the body of an animal to supply a fluid (medical solution). The inlet connection tube 147 is connected to a reservoir (not shown) in which fluid is stored and receives supply of fluid. The reservoir is housed in the outer case 20 as in the first embodiment, and a new fluid is replenished from the outside by a syringe-like replenisher.

  Of the first tube 140A and the second tube 140B, the portions guided by the tube guide frame 150 are arc-shaped portions 146A and 146B each formed in an arc shape. The arcuate portions 146A and 146B are portions that are pressed by a plurality of pressing pins 60 and released from the pressing.

  The first tube 140A is substantially the same as the tube 40 of the first embodiment, and the arrangement position of the arc-shaped portion 146A is the same as the arrangement position of the arc-shaped portion 46 of the tube 40 of the first embodiment. The pressing pins 60 arranged in correspondence with the arcuate portion 146A are arranged on the 90-degree direction side in FIG. The pressing pins 60 are arranged so as to be distributed to the left and right with respect to the 90-degree direction line. The arcuate portion 146B of the second tube 140B is arranged in the direction of 270 degrees that is opposite to the rotation center O with respect to the arcuate portion 146A of the first tube 140A. The pressing pin 60 disposed corresponding to the arcuate portion 146B is disposed in the 270 degree direction of FIG. The pressing pins 60 are arranged to be distributed to the left and right with respect to the 270 degree direction line.

The arc-shaped portion 146A of the first tube 140A and the arc-shaped portion 146B of the second tube 140B are held at the same thickness direction position. However, in the region where the first tube 140A and the second tube 140B cross each other (30 ° direction in FIG. 12), the first tube 140A is disposed at a slightly higher position and the second tube 140B is disposed at a slightly lower position in the thickness direction. Has been. For this reason, the arc-shaped portion 146A and the arc-shaped portion 146B of the cross region are held while being deformed in the thickness direction.

  The tube guide frame 150 has a substantially circular planar shape and is disposed above the first tube 140A and the second tube 140B. The tube guide frame 150 has tube guide grooves 151A at respective positions corresponding to the arcuate portions 146A and 146B on the lower surface thereof. 151B are formed. The tube guide grooves 151A and 151B have a rectangular shape whose sectional shape is opened downward so that the arc-shaped portions 146A and 146B can be guided. The groove depth is deeper than the tube diameter in a state where each arcuate portion 146A, 146B is opened, and the groove width is a lateral width in which each arcuate portion 146A, 146B is pressed by the pressing pin 60 and spreads in the lateral direction. It is formed slightly wider.

  The pressing pin 60 is the same as that of the first embodiment. Therefore, the dimensions, shape, size and material are the same as those in the first embodiment. As shown in FIGS. 12, 13, and 15, 16 pressing pins 60 are provided in the region corresponding to the arcuate portion 146A of the first tube 140A, and correspond to the arcuate portion 146B of the second tube 140B. Sixteen pieces are arranged in the region. A total of 32 pressing pins 60 are inserted into the pressing pin guide holes 91 of the pressing pin guide 90 to be described later, and are disposed along the center lines of the respective arcuate portions 146A and 146B, and the pressing direction P and the opening are opened. Guided to be movable in the direction R. In that case, the arrangement | positioning space | interval T of the press pin 60 and the adjacent press pin 60 is arrange | positioned so that it may be the same also in all the press pins 60. FIG.

The names of the pressing pins 60 are as follows.
Among the 16 pressing pins 60 corresponding to the arcuate portion 146A of the first tube 140A, the upstream side sequentially from the inlet 141 side (upstream side) of the first tube 140A toward the outlet 142 side (downstream side). First pressing pin 61a, upstream second pressing pin 62a, upstream third pressing pin 63a, upstream fourth pressing pin 64a, upstream fifth pressing pin 65a, upstream sixth pressing pin 66a, upstream seventh The pressing pin 67a and the upstream eighth pressing pin 68a are referred to. The upstream first pressing pin 61 is an upstream predetermined pressing pin arranged at the most upstream position of the 16 pressing pins 60. Further, the upstream-side pressing pin is a pressing pin arranged on the upstream side of the 16 pressing pins 60, and the upstream-side third pin arranged subsequent to the downstream side including the upstream-side second pressing pin 62a. It refers to the pressing pin 63a and the upstream fourth pressing pin 64a, and is a pressing pin that presses the first tube 140A between the aforementioned start point and end point.

Of the 16 pressing pins 60, the downstream first pressing pin 76a, the downstream second pressing pin 75a, the downstream third pressing pin 74a, and the downstream fourth pressing in order from the downstream side to the upstream side. The pin 73a, the downstream fifth pressing pin 72a, the downstream sixth pressing pin 71a, the downstream seventh pressing pin 70a, and the downstream eighth pressing pin 69a are referred to. The downstream first pressing pin 76 a is a predetermined downstream pressing pin arranged at the most downstream position of the 16 pressing pins 60. Further, the downstream-side pressing pin is a pressing pin disposed on the downstream side of the 16 pressing pins 60, and includes the downstream first pressing pin 76a, and the downstream-side pressing pin disposed subsequent to the upstream side. 2 indicates a pressing pin 75a and a downstream third pressing pin 74a, and is a pressing pin that newly opens the hollow passage 143a by releasing the pressing of the tube 40 from the start point to the end point.

The upstream side means a side close to the upstream when the fluid Q flows in the first tube 140A, and indicates the side close to the inlet 141 in the first tube 140A. The downstream side means a side close to the downstream when the fluid Q flows in the first tube 140A, and indicates a side close to the outflow port 142 in the first tube 140A.

Of the 16 pressing pins 60 corresponding to the arcuate portion 146B of the second tube 140B, the upstream side sequentially from the inlet 141 side (upstream side) to the outlet 142 side (downstream side) of the second tube 140B. First pressing pin 61b, upstream second pressing pin 62b, upstream third pressing pin 63b, upstream fourth pressing pin 64b, upstream fifth pressing pin 65b, upstream sixth pressing pin 66b, upstream seventh They are referred to as a pressing pin 67b and an upstream eighth pressing pin 68b. The upstream first pressing pin 61 b is an upstream predetermined pressing pin arranged at the most upstream position of the 16 pressing pins 60. Further, the upstream-side pressing pin is a pressing pin arranged on the upstream side of the 16 pressing pins 60, and the upstream-side third pin arranged subsequent to the downstream side including the upstream-side second pressing pin 62b. It refers to the pressing pin 63b and the upstream fourth pressing pin 64b, and is a pressing pin that newly presses the second tube 140B between the aforementioned start point and end point.

Of the 16 pressing pins 60, the downstream first pressing pin 76b, the downstream second pressing pin 75b, the downstream third pressing pin 74b, and the downstream fourth pressing in order from the downstream side to the upstream side. The pin 73b, the downstream fifth pressing pin 72b, the downstream sixth pressing pin 71b, the downstream seventh pressing pin 70b, and the downstream eighth pressing pin 69b are referred to. The downstream first pressing pin 76 b is a downstream predetermined pressing pin disposed at the most downstream position of the 16 pressing pins 60. Further, the downstream-side pressing pin is a pressing pin arranged on the downstream side of the 16 pressing pins 60, and includes the downstream first pressing pin 76b and the downstream-side pressing pin arranged subsequent to the upstream side. The second pressing pin 75b and the downstream third pressing pin 74b are pressing pins that newly open the hollow passage 143b by releasing the pressing of the tube 40 from the start point to the end point.

The upstream side means a side close to the upstream when the fluid Q flows in the second tube 140B, and indicates the side close to the inflow port 141 in the second tube 140B. The downstream side means a side close to the downstream when the fluid Q flows in the second tube 140B, and indicates a side close to the outflow port 142 in the second tube 140B.

  The pressing pin moving device 80 is the same as that of the first embodiment. The rotating cam 81 enables the pressing pin 60 to move in both the pressing direction P and the opening direction R, and the rotating cam 81 is driven to rotate in a predetermined rotation direction K. And a rotation driving circuit 88 that supplies driving power to the motor 86 to rotate the motor 86.

  The rotating cam 81, the motor 86, the motor rotating shaft 87, and the rotation driving circuit 88 are the same as those in the first embodiment. Therefore, the convex part 82, the concave part 83, and the inclined part 84 formed on the surface of the rotating cam 81 are also formed in the same manner as in the first embodiment.

  The pressing pin guide 190 guides the pressing pin 60 so as to be movable in both the aforementioned directions P and R, and has a larger number of pressing pin guide holes than the first embodiment. The pressing pin guide holes are 16 first pressing pin guide holes that guide the 16 pressing pins 61a to 76a corresponding to the arcuate portion 146A of the first tube 140A so as to be movable in the pressing direction P and the opening direction R. There are 16 second pressing pin guide holes 191b that guide the 16 pressing pins 61b to 76b corresponding to the arc-shaped portion 146B of the 191a and the second tube 140B so as to be movable in the pressing direction P and the opening direction R. Yes.

  The base 95 is the same as that of the first embodiment.

  The rotary cam 81 illustrated in FIG. 12 has the same planar position as that of the first embodiment, that is, the first pair boundary a1 is positioned at 0 degrees. At that time, along the circumference of the rotating cam 81, the boundary b1 coincides with the arrangement position of the upstream second pressing pin 62a among the 16 pressing pins 60 corresponding to the arc-shaped portion 146A of the first tube 140A. The boundary a2 coincides with the arrangement position of the downstream second pressing pin 75a, and the boundary a3 is the arrangement of the upstream third pressing pin 63b among the 16 pressing pins 60 corresponding to the arcuate portion 146B of the second tube 140B. The boundary b3 coincides with the arrangement position of the downstream side third pressing pin 74b.

  In FIG. 14, the downstream-side eighth pressing pin 69a illustrated on the right side thereof rides on the convex portion 82 of the rotating cam 81 and presses the arc-shaped portion 146A of the first tube 140A, thereby closing the hollow passage 143a. . Further, the downstream eighth pressing pin 69b illustrated on the left side of FIG. 14 is lowered by the concave portion 83 of the rotating cam 81, and thus the arc-shaped portion 146B of the second tube 140B is opened. For this reason, the hollow passage 143b of the second tube 140B is also opened.

[Fluid Q supply operation, supply stop operation and fluid backflow prevention operation]
The fluid supply operation, supply stop operation, and fluid backflow prevention operation of the first tube 140A in the fluid supply device 110 are performed in the same manner as the tube 40 of the first embodiment. The fluid supply operation, supply stop operation, and fluid backflow prevention operation of the second tube 140B are performed in the same manner as in the case of the first tube 140A, but are shifted by 60 degrees with respect to the first tube 140A. Here, each operation | movement of 140 A of 1st tubes and the 2nd tube 140B is explained in full detail based on FIG.16 and FIG.17.

FIG. 16 is a diagram for explaining the supply state of the fluid Q according to the second embodiment. As the rotating cam 81 rotates, the pressing operation and the opening operation of the pressing pin 60 with respect to the first tube 140A and the second tube 140B and the fluid Q are performed. It is a figure explaining a supply state. Specifically, FIG. 16 shows that the rotating cam 81, the pressing pin 60, and the first tube 140A when the rotating cam 81 rotates in the rotation direction K from the state of FIG. 12 (the state where the boundary a1 is located at 0 degree). And it is the figure explaining the supply stop and supply state of fluid Q and Q by the 2nd tube 140B.

16A shows a state in which the boundary a1 has been rotated by 50 degrees, FIG. 16B shows a state in which the boundary a1 has rotated 55 degrees, FIG. 16C shows a state in which the boundary a1 has rotated 60 degrees, 16 (d) shows a state in which the boundary a1 is rotated 65 degrees, FIG. 16 (e) shows a state in which the boundary a1 has been rotated 70 degrees, and FIG. 16 (f) shows a state in which the boundary a1 has been rotated 75 degrees. It is a figure explaining the supply state of Q. 16 (a) to (f), the illustration on the left side (0 ° to 180 ° side) explains the supply state of the fluid Q in the first tube 140A, and the illustration on the right side (180 ° to 360 °). Side) explains the supply state of the fluid Q in the second tube 140B.

The supply state of the fluid Q in the first tube 140A is as follows.
The supply state of the fluid Q in the first tube 140A is illustrated on each left side (0 degree to 180 degrees side) of FIGS. 16A to 16F, but in the case of the tube 40 of the first embodiment (FIG. 7 (a) to (f), the supply state of the fluid Q).
Therefore, in the first tube 140A (hollow passage 143a) illustrated on the left side (0 to 180 degrees) of FIGS. 16A to 16E (with the boundary a1 rotated by 50 to 70 degrees). The fluid Q is not supplied downstream and is in a supply stopped state. This supply stop state continues after going back to the time when the downstream first pressing pin 76a rides on the previous convex portion 82 of the rotating cam (when the boundary a1 rotates 10 degrees). Therefore, when the boundary a1 is in the range of 10 degrees to 70 degrees, the fluid supply is stopped.

The fluid Q in the first tube 140A (hollow passage 143a) illustrated on the left side (0 to 180 degrees side) of FIG. 16F (with the boundary a1 rotated by 75 degrees) is supplied to the downstream side. Is done. The supply of the fluid Q to the downstream side starts from the time point (e) in FIG. 16 (the state where the boundary a1 is rotated by 70 degrees). The fluid Q is supplied to the downstream side when the downstream first pressing pin 76a rides on the convex portion 82 of the rotating cam (when the boundary a1 rotates 130 degrees, FIG. Continue to the left). Therefore, when the boundary a1 is in the range of 70 degrees to 130 degrees, the fluid supply state is established.

In the first tube 140A, the starting point is when the rotating cam 81 starts to rotate from the state shown in FIG. The starting point is that the upstream first pressing pin 61a presses the first tube 140A to close the hollow passage 143a, and the downstream first pressing pin 76a presses the hollow passage 143a to close (FIG. 16B). )), The upstream second pressing pin 62a disposed immediately downstream of the upstream first pressing pin 61a starts to press the first tube 140A.
Further, when the first tube 140A reaches the state shown in FIG. 16E, the end point is reached. This end point is in a state where the upstream first pressing pin 61a continues to block the hollow passage 143a and the upstream pressing pins 62a to 64a sequentially press the first tube 140A. This is when all of the downstream side pressing pins 76a to 74a pressing the one tube 140A have completed the opening of the hollow passage 143a.

The supply state of the fluid Q in the second tube 140B is as follows.
16 (a) to (e) on the right side (in a state where the boundary a1 is rotated by 50 to 75 degrees), the downstream side pressing pins (73b, 74b, 75b, and 76b) run on the convex portions 82 one after another. go. For this reason, this downstream side pressing pin (73b, 74b, 75b, 76b) presses and closes the second tube 140B, and supplies the fluid Q to the downstream side. The supply of the fluid Q to the downstream side continues after going back to the time when the upstream fourth pressing pin 64b rides on the previous convex portion 82 of the rotating cam (a state where the boundary a1 is rotated 10 degrees). Accordingly, the fluid supply state is established when the boundary a1 is in the range of 10 to 70 degrees.

In the state shown on the right side of FIG. 16F (the state in which the boundary a1 is rotated by 75 degrees), each of the aforementioned downstream pressing pins (73b, 74b, 75b, 76b) remains on the convex portion 82. The fluid Q is not supplied downstream (fluid supply stopped state). This fluid supply stop state starts from a state in which the boundary a1 is rotated by 70 degrees. Further, this fluid supply stop state is when the upstream side fourth pressing pin 64b rides on the next convex portion 82 of the rotating cam (in the state where the boundary a1 is rotated by 130 degrees, the right side of FIG. To the state). Therefore, when the boundary a1 is in the range of 70 degrees to 130 degrees, the fluid supply is stopped.

As described above, the period of the fluid supply state in which the fluid Q is supplied to the downstream side is a period in which the boundary a1 of the rotary cam 81 is at a position of 70 degrees to 130 degrees in the first tube 140A. In 140B, it becomes a period when the boundary a1 of the rotating cam 81 is in the position of 10 degrees to 70 degrees. Further, the period of the fluid supply stop state in which the fluid Q is not supplied to the downstream side is a period in which the boundary a1 of the rotating cam 81 is at a position of 10 degrees to 70 degrees in the first tube 140A, and the rotation is performed in the second tube 140B. This is a period in which the boundary a1 of the cam 81 is at a position between 70 degrees and 130 degrees.

  In addition, as described above, the rotating cam 81 has a pair of the convex portion 82, the concave portion 83, and the inclined portion 84 arranged on the outer peripheral side surface of the rotating cam 81 at three equal intervals. For this reason, as for the fluid Q, while the rotary cam 81 rotates 360 degrees around the rotation center O, the fluid supply state and the supply stop state as shown in FIGS. 16 and 17 are repeated at intervals of 120 degrees.

The backflow prevention operation of the fluid Q in each tube 140A, 140B is as follows.
The backflow prevention operation of the fluid Q in the first tube 140A is the same as that in the tube 40 of the first embodiment. The backflow prevention operation of the fluid Q in the tube 40 illustrated in FIGS. 7A to 7E is performed by the backflow of the fluid Q in the first tube 140A illustrated on the left side of FIGS. This is the same as the prevention operation.
The backflow prevention operation of the fluid Q in the second tube 140B is the same as that in the tube 40 of the first embodiment. On the right side of FIG. 17, the backflow prevention operation of the fluid Q in the second tube 140B is shown.

FIG. 17 is a diagram for explaining another supply state of the fluid Q. When the rotary cam 81 further rotates from the state shown in FIG. 16, the pressure on the first tube 140A and the second tube 140B as the rotary cam 81 moves. It is a figure explaining the press operation and release operation of the pin 60, and the supply state of fluid Q, Q.
17A shows a state in which the boundary a1 is rotated by 115 degrees, FIG. 17B shows a state in which the boundary a1 has been rotated by 120 degrees, FIG. 17C shows a state in which the boundary a1 has been rotated by 125 degrees, 17D is a diagram for explaining the supply state of each fluid Q in a state where the boundary a1 is rotated by 130 degrees, and FIG. 17E is a state where the boundary a1 is rotated by 135 degrees. In FIGS. 17A to 17E, the left side (0 ° to 180 ° side) illustrates the supply state of the fluid Q in the first tube 140A, and the right side (180 ° to 360 ° side). The drawing illustrates the supply state of the fluid Q in the second tube 140B.

Here, the backflow prevention operation of the fluid Q in the second tube 140B is shown on the right side (180 degrees to 360 degrees side) of FIGS. 17A to 17D, and is shown in FIG. The backflow prevention operation is the same as b) to (e). The details of the backflow prevention operation illustrated on the right side (180 ° to 360 ° side) of FIGS. 17A to 17D are the same as those of the first embodiment described in detail with reference to FIGS. . Similar to the case of the first embodiment, the backflow prevention operation is performed when the fluid Q is switched from the state where the fluid Q is not supplied downstream (supply stop state) to the supply state.
Therefore, the backflow prevention operation of the fluid Q in the first tube 140A and the second tube 140B is performed so that the decreased volumes V and V1 in the hollow passages 143a and 143b are substantially equal to the increased volumes W and W1. It is set in the same manner as in the first mode.

In addition, on the second tube 140B side, the time when the rotating cam 81 starts to rotate from the state of FIG. The starting point is that the upstream first pressing pin 61b presses the second tube 140B and closes the hollow passage 143b, and the downstream first pressing pin 76b presses and closes the hollow passage 143b (FIG. ), The upstream second pressing pin 62b disposed immediately downstream of the upstream first pressing pin 61b starts to press the second tube 140B.
The end point is when the state shown in FIG. 17D is reached. This end point is in a state in which the upstream first pressing pin 61b continues to block the hollow passage 143b, and the upstream pressing pins 62b to 64b sequentially press the second tube 140B. This is when all of the downstream side pressing pins 76b to 74b pressing the two tubes 140B have completed the opening of the hollow passage 143b.

  FIG. 18 is a diagram illustrating the rotation angle of the boundary a1 of the rotary cam 81 and the flow rate q of the fluid Q in the second embodiment. That is, when the rotary cam 81 rotates 360 degrees around the rotation center O, the rotation angle of the boundary a1 and the flow rate q of the fluid Q are described. 18A illustrates the first tube 140A, FIG. 18B illustrates the second tube 140B, and FIG. 18C supplies from the first tube 140A and the second tube 140B. It is a figure explaining the state where each made fluid was united. 18A to 18C, the horizontal axis indicates the rotation angle of the boundary a1 accompanying the rotation of the rotary cam 81 with reference to the time point when the boundary a1 is positioned at 0 degrees as shown in FIG. Represents. The vertical axis of (a) to (c) in FIG. 18 represents the flow rate q of the fluid Q.

As is clear from FIG. 18, in the first tube 140A, the fluid supply period t1 is such that the boundary a1 of the rotating cam 81 is 70 degrees to 130 degrees, 190 to 250 degrees, and 310 to 370 as shown in FIG. The fluid supply stop period s1 is a period in which the boundary a1 is rotated by 10 degrees to 70 degrees, 130 to 190 degrees, and 250 to 310 degrees as shown in FIG. In the second tube 140B, the fluid supply period t2 is a period in which the boundary a1 is rotated by 10 to 70 degrees, 130 to 190 degrees, and 250 to 310 degrees as shown in FIG. 18B, and the fluid supply stop period s2 is As shown in FIG. 18B, the rotation period is 70 to 130 degrees, 190 to 250 degrees, and 310 to 370 degrees (10 degrees). In addition, the relationship graph of the flow rate q flowing out to the outlets 142 and 142 (downstream side) of the tubes 140A and 140B with respect to the rotation angle of the boundary a1 is almost as shown in FIGS. 18 (a) and 18 (b). It becomes a rectangular shape.

Furthermore, the fluid supply period t1 of the first tube 140A and the fluid supply period t2 of the second tube 140B are out of phase by 60 degrees, and the fluid supply stop period s1 of the first tube 140A and the fluid supply stop of the second tube 140B are stopped. Similarly, the period s2 is formed with a phase shift of 60 degrees. Therefore, in the state where the fluids supplied from the first tube 140A and the second tube 140B are combined, as shown in FIG. 18C, each fluid supply period t1 of the first tube 140A is set to the second tube 140B. The fluid supply stop periods s2 of the first tube 140A overlap the fluid supply stop periods s2 of the first tube 140A, and the fluid supply stop periods t2 of the second tube 140B overlap.
Further, the flow rate q of the fluid Q is the same in the fluid supply period t1 of the first tube 140A and the fluid supply period t2 of the second tube 140B. For this reason, a fixed amount of the flow rate q is supplied to the rotation angle of the boundary a1 at the combined portion 142a of the outlets 142 and 142 of the tubes 140A and 140B as shown in FIG. Become. In this case, since the rotation speed of the rotating cam 81 is constant, the rotation angle of the boundary a1 corresponds to the elapsed time, and a constant amount of flow rate q is supplied with respect to the elapsed time.

[Effect of Embodiment 2]
The second embodiment has the effects (a) to (g) of the first embodiment, but also has the following effects.

(I) Since the fluid Q is supplied by the two tubes 140A and 140B, the total amount of the fluids Q and Q that can be supplied can be increased compared to the case of using one tube. For this reason, it is possible to appropriately respond to various uses, and various fluid supply devices 110 can be realized.

(Nu) The rectangular waveforms of the fluids Q and Q supplied from the tubes 140A and 140B do not overlap at the merged portion 142a where the outlets 142 and 142 of the two tubes 140A and 140B are merged. For this reason, it is possible to temporarily supply a large amount of fluids Q and Q to prevent a sudden load from being applied to the fluid supply destination as when the rectangular waveforms overlap.

(L) Since the inlets 141 and 141 of the two tubes 140A and 140B are combined, it is possible to supply a large amount of the same fluid Q to the same supply destination without applying a sudden load. it can.

(V) The rectangular shapes of the fluids Q and Q flowing out from the outlets 142 and 142 of the two tubes 140A and 140B do not overlap each other and are formed one after another substantially without interruption. For this reason, in the coalescing location 142a, a constant amount of the flow rate q of the fluid Q can be continuously supplied to the supply destination. For this reason, the supply destination can always receive the required fluid Q stably.

[Embodiment 3]
The fluid supply unit 130 according to the second embodiment uses the first tube 140A and the second tube 140B, combines the inlets 141 and 141 with the inlet connection tube 147, and sets the outlets 142 and 142 to the outlet connection tube 148. It was what united.
The fluid supply unit 230 of the third embodiment is configured separately without combining the inflow ports of the first tube 140A and the second tube 140B. The rest is the same as in the second embodiment.

  FIG. 19 is a plan view of the main part of the fluid supply unit 230 of the third embodiment.

  In the fluid supply unit 230, the inlet 141 of the first tube 140 </ b> A and the inlet 141 of the second tube 140 </ b> B are not combined and configured separately. Therefore, the inlet 141 of the first tube 140A is connected to the inlet connecting tube 147a, and the inlet 141 of the second tube 140B is connected to another inlet connecting tube 147b.

  These inlet connection tubes 147a and 147b are connected to reservoirs (not shown) in which fluids Q and Q are stored, respectively. This reservoir may be a common reservoir for the first tube 140A and the second tube 140B, or may be a dedicated reservoir for the first tube 140A and a dedicated reservoir for the second tube 140B.

  The third embodiment has the effects (i) to (g) of the first embodiment and the (li), (nu), and (wo) of the second embodiment, but also has the following effects.

(W) Since the inlet 141 of the first tube 140A and the inlet 141 of the second tube 140B are configured separately, the fluids Q and Q different from the case where the same fluid Q is supplied from the tubes 140A and 140B. It is possible to appropriately deal with both cases of supplying In the case of supplying the former same fluid Q, the same fluid Q can be continuously supplied in a large amount without applying a sudden load to the supply destination at the merged portion 142a of each outflow port 142, 142. When the latter different fluids Q and Q are supplied from the respective tubes 140A and 140B, different types of fluids Q and Q can be mixed at the merged portion 142a and supplied to the supply destination without applying a sudden load. For example, it is possible to supply a mixed chemical solution in which different chemical solutions are mixed at the coalescing portion 142a to the same part of the experimental animal.

[Embodiment 4]
The fluid supply unit 130 according to the second embodiment uses the first tube 140A and the second tube 140B, combines the inlets 141 and 141 with the inlet connection tube 147, and sets the outlets 142 and 142 to the outlet connection tube 148. It was what united. The fluid supply unit 230 according to the third embodiment is configured separately without combining the inlets of the first tube 140A and the second tube 140B. Other than that was the same as in the second embodiment.
In the fluid supply unit 330 of the fourth embodiment, the inlets 141 and 141 are combined with the inlet connection tube 147 as in the second embodiment, and the outlets 142 and 142 are not combined, and are configured separately. . The rest is the same as in the second and third embodiments.

  FIG. 20 is a plan view of the main part of the fluid supply unit 330 of the fourth embodiment.

  The fluid supply unit 330 is configured by combining the inlet 141 of the first tube 140A and the inlet 141 of the second tube 140B, but the outlet 142 of the first tube 140A and the outlet 142 of the second tube 140B. Are not combined and are configured separately. For this purpose, the outlet 142 of the first tube 140A is connected to the outlet connecting tube 148a, and the outlet 142 of the second tube 140B is connected to another outlet connecting tube 148b.

  These outlet connection tubes 148a and 148b can be separately supplied to a supply destination (not shown).

  The fourth embodiment has the effects (i) to (g) of the first embodiment and the (li) and (le) of the second embodiment, but also has the following effects.

(F) According to the fourth embodiment, the inlets 141 and 141 of the tubes 140A and 140B are combined with the inlet connection tube 147, and the outlets 142 and 142 are configured separately without being combined. It becomes possible to supply the same fluid Q to different supply destinations.

[Embodiment 5]
The fluid supply unit 130 according to the second embodiment uses the first tube 140A and the second tube 140B, combines the inlets 141 and 141 with the inlet connection tube 147, and sets the outlets 142 and 142 to the outlet connection tube 148. It was what united. The fluid supply unit 230 of the third embodiment is configured separately without combining the inflow ports of the first tube 140A and the second tube 140B. In the fluid supply unit 330 of the fourth embodiment, the inlets 141 and 141 are combined with the inlet connection tube 147 as in the second embodiment, and the outlets 142 and 142 are not combined, and are configured separately. It was.
The fluid supply unit 430 of the fifth embodiment is configured separately without combining the inlets 141 and 141 as in the third embodiment, and the outlets 142 and 142 are also configured separately without combining as in the fourth embodiment. To do. The rest is the same as in the second embodiment.

  FIG. 21 is a plan view of the main part of the fluid supply unit 430 of the fifth embodiment.

In the fluid supply unit 430, the inlet 141 of the first tube 140A and the inlet 141 of the second tube 140B are not combined and are configured separately. Therefore, the inlet 141 of the first tube 140A is connected to the inlet connecting tube 147a, and the inlet 141 of the second tube 140B is connected to another inlet connecting tube 147b.
The outflow port 142 of the first tube 140A and the outflow port 142 of the second tube 140B are not combined but configured separately. For this purpose, the outlet 142 of the first tube 140A is connected to the outlet connecting tube 148a, and the outlet 141 of the second tube 140B is connected to another outlet connecting tube 148b. These outlet connection tubes 148a and 148b can be separately connected to a supply destination (not shown).

  The fifth embodiment has the effects (i) to (g) of the first embodiment and (li) of the second embodiment, but also has the following effects.

(E) Since the inlets 141 and 141 of the tubes 140A and 140B are configured separately, the fluid supply conditions of the tubes 140A and 140B can be made different. This fluid supply condition may be at least one of the fluid type, fluid flow rate, fluid supply speed, and fluid supply time supplied by each tube 140A, 140B. For this reason, the fluid supply apparatus suitable for various uses is realizable. Moreover, since the outflow ports 142 and 142 of each tube 140A and 140B are not united and are each independent, it becomes possible to supply a fluid to several supply destinations.

  The present invention includes various modifications other than the embodiments as long as the gist of the present invention is not contradicted. For example, the following modifications are also included.

[Modification 1]
In each embodiment, three pairs of the convex portion 82, the concave portion 83, the upstream inclined portion 84a, and the downstream inclined portion 84b are formed on the outer peripheral side surface of the rotating cam 81. The present invention is not limited to this, and the pair may be one pair, two pairs, or four or more pairs.

[Modification 2]
In each embodiment, the rotational speed of the rotary cam 81 is constant. The present invention is not limited to this, and the rotational speed of the rotary cam 81 may vary. It is preferable to set the fluctuation of the rotation speed in advance. When the rotational speed of the rotating cam 81 fluctuates, the flow rate of the fluid supplied from the outlet of the tube fluctuates over time, so the fluctuation of the rotating speed of the rotating cam 81 is set in advance according to the application. It is preferable to keep it.

[Modification 3]
In each embodiment, 16 pressing pins 60 are used for one tube. The present invention is not limited to this, and may be less than 16 or more than 16.

[Modification 4]
In each embodiment, the pressing pin 60 is disposed on the lower side of the tube, and the rotary cam 81 that moves in the pressing direction P that is the vertical direction (vertical direction) and the opening direction R with respect to the tube is positioned on the lower side of the pressing pin 60. Was to be placed. The present invention is not limited to this, and a plurality of pressing pins are arranged on the outer periphery of the rotary cam, a tube is arranged on the outer peripheral side of the pressing pin, and the pressing pin is placed laterally with respect to the tube. The direction (horizontal direction) may be moved in the pressing direction and the opening direction.

[Modification 5]
In each embodiment, the upstream predetermined pressing pin is the upstream first pressing pin 61, 61a, 61b, and the downstream predetermined pressing pin is the downstream first pressing pin 76, 76a, 76b. The present invention is not limited to this, and upstream upstream pressing pins other than the upstream first pressing pins 61, 61a, 61b may be set as the upstream predetermined pressing pins. A downstream pressing pin other than the downstream first pressing pins 76, 76a, 76b may be set. For example, the upstream predetermined pressing pin may be any one of the upstream second pressing pins 62, 62a, 62b, the upstream third pressing pins 63, 63a, 63b, and the upstream fourth pressing pins 64, 64a, 64b. Good. Further, the downstream predetermined pressing pin is any one of the downstream second pressing pins 75, 75a, 75b, the downstream third pressing pins 74, 74a, 75b, and the downstream fourth pressing pins 73, 73a, 75b. Good.

[Modification 6]
In each embodiment, since the decreased capacities V and V1 are set so as to be substantially equal to the increased capacities W and W1, the inclined surface states of the upstream inclined portion 84a and the downstream inclined portion 84b are appropriately set. It was a thing. The present invention is not limited to this, and the upstream pressing pins 61, 62, 63, 64 are formed after the respective inclined surface shapes of the upstream inclined portion 84 a and the downstream inclined portion 84 b are formed in predetermined shapes. 61a, 62a, 63a, 64a, 61b, 62b, 63b, 64b, etc., the planar shape of the head 60a surface pressing the tubes 40, 140A, 140B, the cross-sectional shape of the upstream pressure pin head 60a surface, downstream The planar shape of the surface of the head 60a that presses the tubes 40, 140A, 140B in the side pressing pins 76, 75, 74, 76a, 75a, 74a, 76b, 75b, 74b, etc., the surface of the head 60a surface of the downstream pressing pin It is also possible to appropriately set at least one of the cross-sectional shape, the arrangement interval T of the upstream pressing pin, and the arrangement interval T of the downstream pressing pin. By appropriately setting at least one as described above, the decrease capacities V and V1 are made substantially equal to the increase capacities W and W1, and the fluid supplied to the supply destination flows back into the fluid supply device. It can be surely prevented.

In addition, the planar shape of the head 60a surface of the upstream pressing pin, the cross-sectional shape of the head 60a surface of the upstream pressing pin, the planar shape of the head 60a surface of the downstream pressing pin, the downstream pressing pin By appropriately setting at least one of the cross-sectional shape of the surface of the head 60a, the arrangement interval T of the upstream pressing pin, and the arrangement interval T of the downstream pressing pin, all the corresponding pressing pins are uniformly set as described above. In some cases, some of the pressing pins are set differently from the other pressing pins. For example, in order to set the planar shape of the head 60a surface of the downstream pressing pin to make the decreased capacities V and V1 substantially equal to the increased capacities W and W1, the surfaces of the heads 60a of all the downstream pressing pins The surface shape of the head 60a with only the most downstream pressing pin is made different from the planar shape of the surface of the head 60a of another downstream pressing pin (for example, the surface area). May be reduced).

[Modification 7]
According to the second to fourth embodiments, the fluids Q and Q are respectively supplied from the two tubes 140A and 140B, the flow rates q and q supplied from the tubes 140A and 140B are set to predetermined amounts, and the fluid supply timings are set. Were set to not overlap. The present invention is not limited to this, and the flow rates q and q and the fluid supply timings supplied from the tubes 140A and 140B may be set independently. For example, the outer diameters of the tubes 140A and 140B and the inner diameter of the hollow passage can be made different so that the flow rates q and q can be set independently. In that case, it is preferable to set the outer diameter of the tube 140A to 1 mm, the inner diameter of the hollow passage to 0.5 mm, the outer diameter of the tube 140B to 0.9 mm, and the inner diameter of the hollow passage to 0.4 mm. Or each rotation cam corresponding to each tube 140A, 140B is provided, and each flow rate q, q and / or which is supplied from each tube 140A, 140B is made different from each other by disposing different positions of the projections and recesses of each rotation cam. Each fluid supply timing can also be set independently. For this reason, it is possible to realize various fluid supply devices that can be appropriately adapted to various applications.

[Modification 8]
According to the second embodiment, the pressing pin moving devices that move the pressing pins corresponding to the two tubes 140A and 140B in both directions P and R are common. The present invention is not limited to this, and a plurality of pressing pin guides and / or pressing pin moving devices may be provided corresponding to a plurality of tubes. For example, the pressing pin guide A and the pressing pin moving device A corresponding to the tube 140A are arranged at predetermined plane positions, and the pressing pin guide B and the pressing pin moving device B corresponding to the tube 140B are arranged at other predetermined plane positions. Also good. Alternatively, the pressing pin A, the pressing pin guide A, and the pressing pin moving device A corresponding to the tube 140A are arranged on the back side in the thickness direction of the fluid supply device, and the pressing pin B, the pressing pin guide B, and the pressing corresponding to the tube 140B are arranged. The pin moving device B may be arranged on the surface side in the thickness direction of the fluid supply device.

[Modification 9]
According to the second to fifth embodiments, the timings of supplying the fluids Q and Q by the two tubes 140A and 140B are shifted from each other, and the fluid supply period t1 in one tube and the fluid supply period t2 in the other tube Was continuous with no time gap. The present invention is not limited to this, and there may be some time space between the fluid supply period t1 in one tube and the fluid supply period t2 in the other tube. Even in this case, the fluids Q and Q are supplied almost continuously to the supply destination of the fluid Q supplied by the two tubes 140A and 140B.

[Modification 10]
According to Embodiments 2 to 5, the fluids Q and Q are supplied by the two tubes 140A and 140B, respectively. The present invention is not limited to this, and each of the fluids may be supplied using three or more tubes. In that case, the inlet and outlet of each tube may be combined, any two or more may be combined, and the other may be separated. In either case, each tube needs to employ the structure for preventing the backflow of fluid according to the present invention.

The fluid supply apparatus of the present invention can be applied to many applications. For example, the fluid supply device of the present invention can be used for implanting a body of an animal and supplying a chemical (fluid) into the body of an experimental animal. In that case, the fluid supply device of the present invention can be implanted under the skin of an animal such as a laboratory animal, and the chemical solution can be supplied into the body of the experimental animal to be useful for animal experiments of the chemical solution. Alternatively, it can be implanted in a human patient and supplied with a healing chemical or supplemented with nutrients. Further, it can be installed outside the human body and the laboratory animal to supply a medical solution and a nutrient to the human and the laboratory animal. When the fluid is a gas, for example, it can be applied to supply a gas for chemical experiments, or a liquid and a gas can be supplied to a micro-TAS (Micro-Total Analysis Systems) to analyze the liquid and the gas. It becomes possible.

  DESCRIPTION OF SYMBOLS 10,110 ... Fluid supply apparatus, 20 ... Outer case, 30, 130, 230, 330, 430 ... Fluid supply unit, 40 ... Tube, 41, 141 ... Inlet, 42, 142 ... Outlet, 43, 143, 143a, 143b ... Hollow passage, 46, 146A, 146B ... Arc-shaped part, 47, 147, 147a, 147b ... Inlet connection tube, 48, 148 148a, 148b ... Outlet connection tube, 49 ... Sealed space, 50, 150 ... Tube guide frame, 51, 151A, 151B ... Tube guide groove, 60 ... Press pin, 60a ..Head, 60b... Pin portion, 61, 61a, 61b... Upstream first pressing pin (upstream predetermined pressing pin), 61p... 62b, upstream second pressing pin, 63, 63a, 63b, upstream third pressing pin, 64, 64a, 64b, upstream fourth pressing pin, 64p, upstream fourth. Pressing pin blockage location, 62 to 64, 62a to 64a, 62b to 64b ... upstream side pressing pin, 65, 65a, 65b ... upstream side fifth pressing pin, 66, 66a, 66b ... upstream side 6 pressing pins, 72, 72a, 72b ... downstream fifth pressing pins, 73, 73a, 73b ... downstream pressing pins, 74, 74a, 74b ... downstream third pressing pins, 76 ˜74, 76a to 74a, 76b to 74b... Downstream pressing pin, 75, 75a, 75b... Second downstream pressing pin, 76, 76a, 76b. (Predetermined pressing pin), 76p: downstream first pressing Block, 80 ... pressing pin moving device, 81 ... rotating cam, 82 ... convex, 83 ... concave, 84 ... slope, 84a ... upstream slope, 84b・ ・ ・ Downstream inclined part, 85 ・ ・ ・ Rotation drive device, 86 ・ ・ ・ Motor, 87 ・ ・ ・ Motor rotation shaft, 88 ・ ・ ・ Rotation drive circuit, 90, 190 ・ ・ ・ Pressing pin guide, 91 ・・ ・ Pressing pin guide hole, 95... Base, 140A... First tube, 140B... Second tube, 142a. .. second pressing pin guide hole, K ... rotation direction, O ... rotation center, P ... pressing direction, Q ... fluid, R ... opening direction, T ... arrangement interval, V, V1 ... Decreasing capacity, W, W1 ... Increasing capacity, h ... Step difference between convex part and concave part, q: flow rate, s: fluid supply stop period, t: fluid supply period, α: average inclination angle of upstream inclined portion, β: average inclination angle of downstream inclined portion

Claims (13)

A tube made of an elastic body with a hollow passage through which fluid can flow;
A plurality of pressing pins movable in a pressing direction for pressing the tube and an opening direction opposite to the pressing direction;
A pressing pin moving device capable of moving the pressing pin in the pressing direction and the opening direction;
Each of the pressing pins sequentially moves in the pressing direction and the opening direction by the pressing pin moving device to close and release the hollow passage from the closed passage, thereby transferring the fluid in the hollow passage to the downstream side of the tube. A fluid supply device capable of supplying toward the
An upstream side disposed downstream of the upstream predetermined pressing pin in a state where an upstream predetermined pressing pin disposed at a predetermined upstream position presses the tube and closes the hollow passage. The reduced capacity of the hollow passage due to the pressing pin newly pressing the tube is such that the downstream pressing pin arranged to be spaced downstream from the upstream pressing pin newly opens the tube from the pressed state. The fluid supply device is substantially equal to the increased capacity of the hollow passage. The fluid supply device according to claim 1,
The upstream predetermined pressing pin presses the tube to close the hollow passage, and the downstream predetermined pressing pin disposed at a predetermined position on the downstream side of the pressing pin presses the tube to cause the hollow passage. When the upstream second pressing pin arranged immediately downstream of the upstream predetermined pressing pin starts to press the tube in the closed state, the upstream predetermined pressing pin closes the hollow passage In the course of each of the upstream side pressing pins including the upstream side second pressing pin and the pressing pin disposed downstream of the upstream side second pressing pin sequentially pressing the tube, All of the downstream pressure pins that press the tube, including the downstream predetermined pressure pin and the pressure pin arranged on the upstream side of the downstream predetermined pressure pin, open the tube from the pressed state. When the end of the opening of the hollow passage due to the end point is taken as the end point, the reduced capacity of the hollow passage due to the upstream pressing pin pressing the tube between the start point and the end point is the downstream side pressing A fluid supply device characterized by being substantially equal to the increased capacity of the hollow passage upon completion of opening of the hollow passage by a pin. The fluid supply device according to claim 1,
The pressing pin moving device is
A rotating cam that enables each of the pressing pins to move in the pressing direction and the opening direction;
A rotation drive device for rotating the rotation cam in a predetermined direction;
A fluid supply device comprising: The fluid supply device according to claim 3,
The rotating cam is
A convex portion capable of moving the pressing pin in the pressing direction;
A recess that allows the pressing pin to move in the opening direction by the elastic force of the tube;
An inclined part formed between the convex part and the concave part;
A fluid supply apparatus characterized by comprising: The fluid supply device according to claim 4,
The inclined portion of the rotating cam is
An upstream inclined portion that is arranged on the upstream side with respect to the recess, and that allows each of the pressing pins to move in the pressing direction;
A downstream inclined portion that is arranged on the downstream side with respect to the recess, and that allows each of the pressing pins to move in the opening direction;
With
Each of the inclined surface shapes of the upstream inclined portion and the downstream inclined portion is set so that the reduced capacity is substantially equal to the increased capacity. The fluid supply device according to claim 5,
The fluid supply device according to claim 1, wherein an average inclination angle of the downstream inclined portion is set smaller than an average inclination angle of the upstream inclined portion. The fluid supply device according to any one of claims 5 to 6,
The upstream predetermined pressing pin presses the tube to close the hollow passage, and the downstream pressing pin starts to move in the opening direction by the downstream inclined portion to open the tube and open the hollow passage. Starting from the start point, in the state where the upstream predetermined pressing pin closes the hollow passage, the upstream pressing pin newly presses the tube by the upstream inclined portion, and the downstream pressing In the case where the end point is when the pin newly opens the tube by the downstream side inclined portion, the upstream side press pin newly presses the tube between the start point and the end point. The reduced capacity is such that the upstream side inclined pin and the downstream inclined pin are substantially equal to the increased capacity of the hollow passage by newly opening the hollow passage. Fluid supply device, characterized in that the inclined surface shape of the downstream-side inclined portion is formed. The fluid supply device according to claim 4,
The inclined portion of the rotating cam is
An upstream inclined portion that is arranged on the upstream side with respect to the recess, and that allows each of the pressing pins to move in the pressing direction;
A downstream inclined portion that is arranged on the downstream side with respect to the recess, and that allows each of the pressing pins to move in the opening direction;
With
The upstream inclined portion and the downstream inclined portion are each formed in a predetermined shape,
Planar shape of the head surface of the upstream pressing pin, sectional shape of the head surface of the upstream pressing pin, planar shape of the head surface of the downstream pressing pin, sectional of the head surface of the downstream pressing pin At least one of the shape, the arrangement interval of the upstream pressing pins, and the arrangement interval of the downstream pressing pins is set so that the reduced capacity is substantially equal to the increased capacity. Fluid supply device. The fluid supply device according to any one of claims 1 to 8,
The fluid supply apparatus according to claim 1, wherein the graph of the flow rate relative to the elapsed time of the fluid supplied to the downstream side in the hollow passage of the tube has a substantially rectangular shape. The fluid supply device according to any one of claims 1 to 9,
A fluid supply apparatus comprising: a plurality of tubes, wherein each fluid is supplied by each tube. The fluid supply device according to claim 10, comprising:
The outlet of each tube is united, and the relationship graph of the flow rate with respect to the elapsed time of each fluid flowing out from each outlet is almost rectangular, and the fluids flowing out from each outlet do not overlap in time. A fluid supply device. The fluid supply device according to claim 11, comprising:
The rectangular shapes related to the fluids flowing out from the outlets of the tubes are formed one after another substantially without interruption, and the fluid at the union location of the outlets of the tubes flows out at a substantially constant flow rate. A fluid supply apparatus characterized by: The fluid supply device according to claim 10, comprising:
A fluid supply apparatus, wherein the outlet of each tube is independent.

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